Thunderstaff (Card)

Thunderstaff
In 1072 decks 0% of 3868317 decks
DougY
Jan 14, 2022
Too-Specific Top 10 - Stax Switch
Doug investigates the most popular artifacts that have 'on/off' switches!
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Top Commanders (4)
Fumiko the Lowblood
18.64% of 236 decks 44 decks
Phelddagrif
11.63% of 2460 decks 286 decks
The Locust God
0.89% of 5382 decks 48 decks
Derevi, Empyrial Tactician
0.86% of 5836 decks 50 decks
New Cards (2)
Aurelia, the Law Above
44% of 9 decks +41% synergy
Officious Interrogation
25% of 12 decks +24% synergy
High Synergy Cards (10)
Flurry of Wings
52% of 389 decks +52% synergy
Ezuri's Predation
51% of 474 decks +49% synergy
Mercy Killing
44% of 431 decks +44% synergy
Reins of Power
45% of 638 decks +44% synergy
Nelly Borca, Impulsive Accuser
44% of 9 decks +44% synergy
Take the Bait
44% of 9 decks +43% synergy
Ghostly Prison
48% of 671 decks +43% synergy
Rites of Flourishing
43% of 490 decks +42% synergy
Suture Priest
41% of 670 decks +39% synergy
Borrowing 100,000 Arrows
39% of 638 decks +38% synergy
Top Cards (10)
Rampant Growth
49% of 490 decks +33% synergy
Farseek
43% of 490 decks +28% synergy
Cultivate
41% of 490 decks +19% synergy
Propaganda
40% of 638 decks +35% synergy
Selvala, Explorer Returned
37% of 417 decks +37% synergy
Questing Phelddagrif
37% of 389 decks +37% synergy
Keep Watch
37% of 638 decks +36% synergy
Bident of Thassa
37% of 634 decks +34% synergy
Sphere of Safety
37% of 670 decks +34% synergy
Dictate of Karametra
36% of 477 decks +35% synergy
Creatures (50)
Farhaven Elf
32% of 490 decks +30% synergy
Niv-Mizzet, the Firemind
32% of 138 decks +31% synergy
Gluntch, the Bestower
30% of 225 decks +30% synergy
Breena, the Demagogue
28% of 102 decks +28% synergy
Kutzil, Malamet Exemplar
28% of 18 decks +23% synergy
Baird, Steward of Argive
28% of 642 decks +27% synergy
Whirlpool Warrior
26% of 138 decks +26% synergy
Windborn Muse
26% of 671 decks +24% synergy
Frontier Warmonger
25% of 376 decks +24% synergy
The Council of Four
23% of 248 decks +23% synergy
Karazikar, the Eye Tyrant
22% of 94 decks +22% synergy
Kazuul, Tyrant of the Cliffs
22% of 401 decks +21% synergy
Kwain, Itinerant Meddler
22% of 389 decks +22% synergy
Death Kiss
21% of 266 decks +21% synergy
Kardur, Doomscourge
21% of 100 decks +20% synergy
Brash Taunter
21% of 373 decks +19% synergy
Goblin Spymaster
21% of 393 decks +20% synergy
Vengeful Ancestor
21% of 341 decks +20% synergy
Niv-Mizzet, Parun
20% of 137 decks +18% synergy
Agitator Ant
20% of 376 decks +19% synergy
Geode Rager
20% of 372 decks +19% synergy
Emberwilde Captain
19% of 372 decks +19% synergy
The Second Doctor
19% of 47 decks +18% synergy
Seedborn Muse
19% of 490 decks +14% synergy
Life of the Party
18% of 299 decks +18% synergy
Fertilid
18% of 490 decks +17% synergy
Sakura-Tribe Elder
18% of 490 decks +9% synergy
Elvish Rejuvenator
18% of 470 decks +18% synergy
Loran of the Third Path
18% of 253 decks +14% synergy
Dawntreader Elk
18% of 490 decks +17% synergy
Frenzied Saddlebrute
18% of 369 decks +17% synergy
Master of Ceremonies
17% of 454 decks +16% synergy
Grismold, the Dreadsower
17% of 54 decks +16% synergy
Goblin Diplomats
16% of 401 decks +16% synergy
Soul Warden
16% of 671 decks +14% synergy
Diligent Farmhand
16% of 490 decks +16% synergy
Varchild, Betrayer of Kjeldor
16% of 392 decks +15% synergy
Fumiko the Lowblood
15% of 401 decks +15% synergy
Magus of the Wheel
15% of 396 decks +13% synergy
Faeburrow Elder
15% of 370 decks +12% synergy
Warmonger Hellkite
15% of 397 decks +15% synergy
Xantcha, Sleeper Agent
15% of 107 decks +14% synergy
Felisa, Fang of Silverquill
15% of 102 decks +14% synergy
Gisela, Blade of Goldnight
15% of 136 decks +13% synergy
Flumph
15% of 545 decks +14% synergy
Bothersome Quasit
14% of 266 decks +13% synergy
Tahngarth, First Mate
14% of 96 decks +13% synergy
Komainu Battle Armor
14% of 311 decks +13% synergy
Humble Defector
13% of 397 decks +12% synergy
Gahiji, Honored One
13% of 55 decks +13% synergy
Instants (50)
Respite
34% of 490 decks +34% synergy
Riot Control
31% of 669 decks +30% synergy
Swords to Plowshares
31% of 671 decks +2% synergy
Generous Gift
29% of 604 decks +17% synergy
Unwind
29% of 612 decks +27% synergy
Izzet Charm
28% of 138 decks +27% synergy
Blunt the Assault
28% of 490 decks +27% synergy
Illusionist's Gambit
27% of 634 decks +27% synergy
Beast Within
27% of 490 decks +8% synergy
Chaos Warp
27% of 401 decks +11% synergy
Arcane Denial
26% of 638 decks +17% synergy
Despark
25% of 106 decks +21% synergy
Counterspell
25% of 638 decks +4% synergy
Harrow
25% of 490 decks +20% synergy
Fact or Fiction
25% of 638 decks +21% synergy
Rakdos Charm
24% of 112 decks +21% synergy
Blustersquall
23% of 636 decks +22% synergy
Rewind
23% of 638 decks +21% synergy
Boros Charm
22% of 136 decks +16% synergy
Terminate
21% of 112 decks +16% synergy
Path to Exile
21% of 671 decks +2% synergy
Oblation
21% of 671 decks +20% synergy
Inkshield
21% of 102 decks +19% synergy
Batwing Brume
20% of 113 decks +20% synergy
Fracture
19% of 102 decks +17% synergy
Domineering Will
17% of 618 decks +17% synergy
Master Warcraft
17% of 136 decks +16% synergy
Stroke of Midnight
17% of 90 decks +9% synergy
Mortify
16% of 113 decks +13% synergy
Negate
16% of 636 decks +4% synergy
Dovin's Veto
15% of 417 decks +11% synergy
Krosan Grip
14% of 490 decks +10% synergy
Thrill of Possibility
14% of 381 decks +9% synergy
Brainstorm
14% of 638 decks +3% synergy
Aetherize
14% of 635 decks +11% synergy
Blue Sun's Zenith
13% of 636 decks +12% synergy
Anguished Unmaking
13% of 108 decks +7% synergy
Flame of Anor
12% of 24 decks +11% synergy
Big Score
12% of 299 decks +7% synergy
Bedevil
11% of 106 decks +8% synergy
Deflecting Palm
11% of 134 decks +10% synergy
Not Dead After All
11% of 27 decks +9% synergy
An Offer You Can't Refuse
11% of 433 decks +1% synergy
Teferi's Protection
11% of 642 decks +2% synergy
Utter End
11% of 110 decks +9% synergy
Void Rend
11% of 37 decks +9% synergy
Assassin's Trophy
11% of 56 decks +5% synergy
Selesnya Charm
10% of 431 decks +10% synergy
Golgari Charm
10% of 58 decks +9% synergy
Putrefy
10% of 58 decks +7% synergy
Sorceries (50)
Blasphemous Act
27% of 401 decks +10% synergy
Theft of Dreams
26% of 638 decks +26% synergy
Disrupt Decorum
25% of 393 decks +23% synergy
Grow from the Ashes
24% of 471 decks +24% synergy
Kodama's Reach
24% of 490 decks +8% synergy
Circuitous Route
23% of 469 decks +22% synergy
Aether Gale
22% of 618 decks +21% synergy
Seeds of Renewal
21% of 473 decks +21% synergy
Tempt with Discovery
21% of 490 decks +19% synergy
Sleep
21% of 636 decks +20% synergy
Restock
20% of 490 decks +20% synergy
Chronomantic Escape
17% of 671 decks +17% synergy
Chain Reaction
17% of 401 decks +15% synergy
Nature's Lore
17% of 490 decks +2% synergy
Spectacular Showdown
16% of 266 decks +15% synergy
Beck // Call
15% of 389 decks +15% synergy
Taunt from the Rampart
15% of 27 decks +14% synergy
Vandalblast
14% of 401 decks +6% synergy
Rip Apart
14% of 121 decks +13% synergy
Feed the Swarm
14% of 195 decks +4% synergy
Faithless Looting
14% of 401 decks +5% synergy
Approach of the Second Sun
14% of 644 decks +12% synergy
Mythos of Snapdax
12% of 49 decks +12% synergy
Secret Rendezvous
12% of 565 decks +11% synergy
Supreme Verdict
12% of 469 decks +8% synergy
Bala Ged Recovery
11% of 411 decks +7% synergy
Cut a Deal
11% of 354 decks +10% synergy
Read the Bones
10% of 210 decks +6% synergy
Savage Twister
10% of 98 decks +10% synergy
Solar Blaze
10% of 130 decks +10% synergy
Three Visits
10% of 490 decks -2% synergy
Shattered Perception
10% of 401 decks +10% synergy
Mob Rule
10% of 397 decks +9% synergy
Debt to the Deathless
10% of 112 decks +9% synergy
Tormenting Voice
10% of 398 decks +8% synergy
Austere Command
10% of 671 decks +4% synergy
Diabolic Tutor
9% of 212 decks +6% synergy
Windfall
9% of 638 decks +3% synergy
Don't Move
9% of 33 decks +8% synergy
Blot Out the Sky
9% of 102 decks +9% synergy
Sylvan Offering
9% of 476 decks +8% synergy
Wash Out
9% of 638 decks +8% synergy
Farewell
9% of 486 decks +2% synergy
Collective Voyage
8% of 490 decks +8% synergy
Fumigate
8% of 646 decks +7% synergy
Collective Defiance
8% of 395 decks +8% synergy
Promise of Loyalty
8% of 564 decks +7% synergy
Vanquish the Horde
8% of 520 decks +6% synergy
Mana Geyser
8% of 401 decks +5% synergy
Search for Tomorrow
8% of 490 decks +6% synergy
Utility Artifacts (34)
Angel's Trumpet
28% of 1072 decks +28% synergy
Orbs of Warding
28% of 1045 decks +27% synergy
Swiftfoot Boots
24% of 1069 decks -4% synergy
Wayfarer's Bauble
23% of 1070 decks +12% synergy
Crown of Doom
22% of 1047 decks +21% synergy
Norn's Annex
20% of 670 decks +19% synergy
Elixir of Immortality
17% of 1069 decks +16% synergy
Temple Bell
16% of 1069 decks +15% synergy
Crawlspace
14% of 1072 decks +13% synergy
Lightning Greaves
13% of 1072 decks -12% synergy
Dingus Staff
12% of 1072 decks +12% synergy
Fist of Suns
12% of 25 decks +11% synergy
Bloodthirsty Blade
11% of 982 decks +11% synergy
Otherworld Atlas
11% of 1069 decks +10% synergy
Brass's Tunnel-Grinder
9% of 33 decks +7% synergy
Howling Mine
9% of 1072 decks +7% synergy
Wedding Ring
9% of 510 decks +8% synergy
Wishclaw Talisman
8% of 200 decks +6% synergy
Skullclamp
8% of 1072 decks -4% synergy
Unstable Glyphbridge
8% of 48 decks +8% synergy
Chimil, the Inner Sun
8% of 75 decks +5% synergy
Neurok Stealthsuit
7% of 636 decks +7% synergy
Folio of Fancies
7% of 565 decks +6% synergy
Thousand-Year Elixir
7% of 1070 decks +4% synergy
Contested Game Ball
7% of 60 decks +7% synergy
Urza's Armor
6% of 1072 decks +6% synergy
Sunforger
6% of 136 decks +5% synergy
Etherwrought Page
6% of 52 decks +6% synergy
The One Ring
6% of 288 decks -3% synergy
Mithril Coat
5% of 221 decks -1% synergy
Blackblade Reforged
5% of 1034 decks +1% synergy
Conjurer's Closet
5% of 1069 decks +3% synergy
Ward of Bones
5% of 1070 decks +5% synergy
Thaumatic Compass
5% of 1035 decks +4% synergy
Enchantments (50)
Palliation Accord
34% of 469 decks +34% synergy
Trouble in Pairs
33% of 18 decks +28% synergy
Frontier Siege
33% of 476 decks +33% synergy
Dictate of Kruphix
32% of 619 decks +31% synergy
Briar Patch
32% of 490 decks +32% synergy
Reverence
29% of 671 decks +29% synergy
Teferi's Moat
28% of 469 decks +28% synergy
Hot Pursuit
28% of 18 decks +27% synergy
Orim's Prayer
27% of 671 decks +27% synergy
Wilderness Reclamation
26% of 445 decks +24% synergy
Fevered Visions
25% of 137 decks +24% synergy
Island Sanctuary
24% of 671 decks +24% synergy
Kumena's Awakening
23% of 613 decks +23% synergy
Monastery Siege
20% of 618 decks +20% synergy
Shiny Impetus
20% of 376 decks +19% synergy
Rite of the Raging Storm
20% of 396 decks +19% synergy
Revenge of Ravens
19% of 200 decks +18% synergy
Righteous Cause
18% of 671 decks +18% synergy
Mirari's Wake
17% of 431 decks +14% synergy
Hissing Miasma
17% of 211 decks +17% synergy
Redemption Arc
17% of 18 decks +15% synergy
Heartbeat of Spring
16% of 490 decks +15% synergy
Mind Unbound
16% of 636 decks +16% synergy
Impact Tremors
16% of 397 decks +12% synergy
City on Fire
16% of 120 decks +13% synergy
The Sound of Drums
15% of 39 decks +14% synergy
Outpost Siege
15% of 397 decks +14% synergy
Curse of Disturbance
15% of 203 decks +15% synergy
Sphere of Duty
15% of 671 decks +15% synergy
Curse of Opulence
15% of 393 decks +13% synergy
Marchesa's Decree
14% of 203 decks +13% synergy
Ghoulish Impetus
14% of 29 decks +13% synergy
Intruder Alarm
13% of 638 decks +12% synergy
Smothering Tithe
13% of 614 decks +1% synergy
Court of Ire
13% of 369 decks +12% synergy
Parasitic Impetus
13% of 196 decks +12% synergy
War's Toll
13% of 401 decks +12% synergy
Court of Embereth
12% of 56 decks +11% synergy
Blood Reckoning
12% of 211 decks +12% synergy
Circle of Flame
12% of 401 decks +12% synergy
Rhystic Study
12% of 638 decks -2% synergy
Cast Out
11% of 644 decks +11% synergy
Darksteel Mutation
11% of 669 decks +8% synergy
Cunning Rhetoric
11% of 190 decks +10% synergy
Ethereal Absolution
10% of 106 decks +10% synergy
Deathreap Ritual
10% of 58 decks +9% synergy
Assemble the Legion
10% of 136 decks +9% synergy
Binding the Old Gods
10% of 49 decks +9% synergy
Bitter Feud
10% of 397 decks +10% synergy
Dramatic Finale
10% of 102 decks +10% synergy
Planeswalkers (6)
Koth, Fire of Resistance
13% of 158 decks +12% synergy
Gideon, Champion of Justice
12% of 669 decks +12% synergy
Teyo, Geometric Tactician
7% of 92 decks +6% synergy
The Eternal Wanderer
6% of 209 decks +4% synergy
Vraska the Unseen
5% of 58 decks +5% synergy
The Wanderer
5% of 607 decks +5% synergy
Utility Lands (45)
Bojuka Bog
28% of 211 decks +13% synergy
Kessig Wolf Run
26% of 98 decks +22% synergy
Reliquary Tower
25% of 1070 decks -3% synergy
Restless Prairie
17% of 30 decks +16% synergy
Temple of the False God
14% of 1072 decks +4% synergy
Restless Anchorage
14% of 29 decks +13% synergy
Rogue's Passage
14% of 1069 decks -5% synergy
Skarrg, the Rage Pits
13% of 98 decks +13% synergy
Castle Embereth
11% of 381 decks +9% synergy
Saltcrusted Steppe
11% of 431 decks +11% synergy
Hidden Volcano
11% of 36 decks +10% synergy
Secluded Steppe
11% of 671 decks +9% synergy
Maze of Ith
11% of 1072 decks +8% synergy
Grim Backwoods
10% of 58 decks +10% synergy
Minas Tirith
10% of 123 decks +4% synergy
Vault of the Archangel
10% of 113 decks +7% synergy
Forgotten Cave
9% of 401 decks +7% synergy
Spinerock Knoll
9% of 401 decks +7% synergy
Treetop Village
9% of 490 decks +8% synergy
Hall of Heliod's Generosity
9% of 605 decks +6% synergy
Volatile Fault
8% of 60 decks +7% synergy
Sunhome, Fortress of the Legion
8% of 136 decks +7% synergy
Slayers' Stronghold
8% of 136 decks +7% synergy
Barren Moor
8% of 212 decks +6% synergy
Yavimaya, Cradle of Growth
8% of 907 decks -1% synergy
Boseiju, Who Endures
8% of 347 decks -2% synergy
Faerie Conclave
7% of 638 decks +7% synergy
Darksteel Citadel
7% of 1072 decks +2% synergy
War Room
6% of 949 decks -0% synergy
Buried Ruin
6% of 1069 decks +1% synergy
Valakut, the Molten Pinnacle
6% of 401 decks +5% synergy
Lair of the Hydra
6% of 371 decks +5% synergy
Mikokoro, Center of the Sea
6% of 1070 decks +4% synergy
Mines of Moria
6% of 82 decks +3% synergy
Desolate Lighthouse
6% of 138 decks +5% synergy
Alchemist's Refuge
6% of 401 decks +4% synergy
Cabal Coffers
6% of 212 decks -0% synergy
Otawara, Soaring City
6% of 461 decks -3% synergy
Shambling Vent
6% of 109 decks +5% synergy
Kor Haven
5% of 671 decks +5% synergy
Mystic Sanctuary
5% of 562 decks -1% synergy
Hissing Quagmire
5% of 57 decks +5% synergy
Eiganjo, Seat of the Empire
5% of 489 decks +0% synergy
Wandering Fumarole
5% of 137 decks +5% synergy
Pit of Offerings
5% of 79 decks +4% synergy
Mana Artifacts (50)
Sol Ring
64% of 1072 decks -20% synergy
Izzet Signet
48% of 138 decks +41% synergy
Arcane Signet
46% of 976 decks -24% synergy
Rakdos Signet
43% of 112 decks +36% synergy
Orzhov Signet
42% of 113 decks +35% synergy
Dimir Signet
33% of 84 decks +25% synergy
Izzet Locket
30% of 137 decks +30% synergy
Boros Signet
28% of 136 decks +22% synergy
Izzet Cluestone
28% of 138 decks +27% synergy
Gruul Signet
27% of 98 decks +24% synergy
Golgari Signet
24% of 58 decks +21% synergy
Talisman of Hierarchy
23% of 106 decks +17% synergy
Mind Stone
22% of 1072 decks +4% synergy
Selesnya Signet
19% of 431 decks +17% synergy
Simic Signet
19% of 401 decks +15% synergy
Fire Diamond
18% of 401 decks +15% synergy
Commander's Sphere
18% of 1047 decks +1% synergy
Talisman of Creativity
16% of 132 decks +9% synergy
Azorius Signet
15% of 469 decks +9% synergy
Talisman of Indulgence
13% of 112 decks +8% synergy
Charcoal Diamond
13% of 212 decks +10% synergy
Talisman of Conviction
13% of 130 decks +8% synergy
Talisman of Dominance
13% of 85 decks +5% synergy
Thought Vessel
12% of 1044 decks -3% synergy
Decanter of Endless Water
11% of 628 decks +6% synergy
Talisman of Impulse
11% of 98 decks +10% synergy
Fellwar Stone
11% of 1072 decks -10% synergy
Hedron Archive
11% of 1045 decks +8% synergy
Azorius Keyrune
10% of 469 decks +10% synergy
Boros Locket
8% of 131 decks +8% synergy
Darksteel Ingot
8% of 1072 decks +7% synergy
Glittering Stockpile
8% of 299 decks +7% synergy
Midnight Clock
8% of 562 decks +5% synergy
Thran Dynamo
7% of 1072 decks +3% synergy
Boros Cluestone
7% of 136 decks +7% synergy
Sky Diamond
7% of 638 decks +4% synergy
Marble Diamond
7% of 671 decks +4% synergy
Everflowing Chalice
6% of 1069 decks +2% synergy
Chromatic Lantern
6% of 1069 decks -3% synergy
Heraldic Banner
6% of 982 decks +4% synergy
Cursed Mirror
6% of 358 decks +4% synergy
Basalt Monolith
6% of 1072 decks +3% synergy
Raugrin Crystal
6% of 50 decks +6% synergy
Jeskai Banner
6% of 51 decks +6% synergy
Obelisk of Esper
6% of 52 decks +6% synergy
Coveted Jewel
6% of 1032 decks +5% synergy
Misleading Signpost
6% of 70 decks +4% synergy
Prismatic Lens
6% of 1070 decks +4% synergy
Worn Powerstone
6% of 1072 decks +3% synergy
Throne of Eldraine
5% of 139 decks +2% synergy
Lands (50)
Seaside Citadel
72% of 389 decks +69% synergy
Command Tower
54% of 1069 decks -19% synergy
Jungle Shrine
53% of 55 decks +49% synergy
Izzet Boilerworks
42% of 138 decks +38% synergy
Swiftwater Cliffs
41% of 137 decks +39% synergy
Nomad Outpost
40% of 52 decks +37% synergy
Arcane Sanctum
38% of 52 decks +35% synergy
Mystic Monastery
37% of 51 decks +35% synergy
Evolving Wilds
36% of 1069 decks +15% synergy
Spara's Headquarters
35% of 246 decks +30% synergy
Opulent Palace
34% of 32 decks +31% synergy
Izzet Guildgate
34% of 138 decks +33% synergy
Simic Guildgate
34% of 401 decks +32% synergy
Selesnya Guildgate
32% of 431 decks +31% synergy
Blossoming Sands
32% of 417 decks +30% synergy
Terramorphic Expanse
32% of 1070 decks +16% synergy
Savage Lands
31% of 45 decks +29% synergy
Thornwood Falls
30% of 387 decks +29% synergy
Highland Lake
29% of 137 decks +29% synergy
Temple of Silence
29% of 112 decks +25% synergy
Cinder Glade
28% of 98 decks +19% synergy
Canopy Vista
27% of 416 decks +19% synergy
Selesnya Sanctuary
27% of 431 decks +24% synergy
Prairie Stream
27% of 451 decks +19% synergy
Azorius Chancery
26% of 469 decks +23% synergy
Crumbling Necropolis
26% of 39 decks +22% synergy
Tangled Islet
26% of 141 decks +24% synergy
Blighted Woodland
25% of 475 decks +22% synergy
Sandsteppe Citadel
25% of 32 decks +22% synergy
Godless Shrine
25% of 113 decks +15% synergy
Frontier Bivouac
24% of 34 decks +21% synergy
Exotic Orchard
23% of 1070 decks -11% synergy
Graypelt Refuge
23% of 431 decks +23% synergy
Indatha Triome
23% of 30 decks +20% synergy
Zagoth Triome
23% of 30 decks +20% synergy
Temple of Malice
23% of 112 decks +20% synergy
Rakdos Carnarium
23% of 112 decks +20% synergy
Temple of Triumph
23% of 136 decks +19% synergy
Sacred Foundry
23% of 136 decks +14% synergy
Savai Triome
22% of 49 decks +19% synergy
Overgrown Tomb
22% of 58 decks +13% synergy
Orzhov Basilica
22% of 113 decks +19% synergy
Myriad Landscape
22% of 1047 decks +1% synergy
Boros Garrison
22% of 136 decks +19% synergy
Temple of Epiphany
22% of 137 decks +18% synergy
Temple Garden
22% of 431 decks +13% synergy
Hallowed Fountain
22% of 469 decks +12% synergy
Wind-Scarred Crag
22% of 134 decks +20% synergy
Raffine's Tower
22% of 37 decks +18% synergy
Dragonskull Summit
21% of 112 decks +15% synergy