Marwyn, the Nurturer + Staff of Domination
Marwyn, the Nurturer
Staff of Domination
Requires
Marwyn, the Nurturer must be on the battlefield.
Staff of Domination must be on the battlefield.
Marwyn has a power of at least five.
Marwyn does not have summoning sickness.
Steps
- Activate Marwyn by tapping it, adding at least
. - Activate Staff of Domination's third ability by paying
and tapping it, untapping Marwyn. - Activate Staff of Domination's first ability by paying
, untapping it. - Repeat.
Results
Infinite card draw. Infinite draw triggers. Infinite green mana. Infinite lifegain. Infinite lifegain triggers. Infinite untap of creatures you control.
Top Commanders (15)
Marwyn, the Nurturer
63.96% of 5496 decks
3515 decks
Ezuri, Renegade Leader
36.64% of 2672 decks
979 decks
Tyvar the Bellicose
33.44% of 1794 decks
600 decks
Lathril, Blade of the Elves
25.13% of 20489 decks
5148 decks
Seton, Krosan Protector
24.32% of 958 decks
233 decks
Raggadragga, Goreguts Boss
15.51% of 7175 decks
1113 decks
Selvala, Explorer Returned
13.44% of 2173 decks
292 decks
Freyalise, Llanowar's Fury
12.77% of 1503 decks
192 decks
Willowdusk, Essence Seer
11.45% of 2149 decks
246 decks
Rhys the Redeemed
10.64% of 3862 decks
411 decks
Yisan, the Wanderer Bard
7.14% of 1933 decks
138 decks
Galadriel, Light of Valinor
5.59% of 4523 decks
253 decks
Voja, Jaws of the Conclave
4.47% of 7479 decks
334 decks
Selvala, Heart of the Wilds
2.80% of 4707 decks
132 decks
Omnath, Locus of Mana
2.57% of 5339 decks
137 decks
New Cards (5)
Annie Joins Up
95% of 63 decks
+91% synergy
Vraska Joins Up
46% of 48 decks
+44% synergy
Great Train Heist
35% of 26 decks
+28% synergy
Lavaspur Boots
30% of 71 decks
+23% synergy
Festering Gulch
27% of 30 decks
+26% synergy
High Synergy Cards (10)
Elvish Archdruid
88% of 15956 decks
+86% synergy
Priest of Titania
83% of 15956 decks
+81% synergy
Elvish Mystic
89% of 15956 decks
+81% synergy
Llanowar Elves
90% of 15956 decks
+79% synergy
Beast Whisperer
83% of 15951 decks
+76% synergy
Fyndhorn Elves
82% of 15956 decks
+75% synergy
Shalai and Hallar
72% of 423 decks
+71% synergy
Leaf-Crowned Visionary
70% of 12516 decks
+68% synergy
Circle of Dreams Druid
69% of 15328 decks
+67% synergy
Reclamation Sage
69% of 15956 decks
+63% synergy
Top Cards (10)
Swords to Plowshares
70% of 1713 decks
+41% synergy
Rhythm of the Wild
66% of 1823 decks
+61% synergy
Beast Within
62% of 15956 decks
+43% synergy
Elves of Deep Shadow
60% of 6721 decks
+58% synergy
Tyvar, Jubilant Brawler
59% of 4253 decks
+58% synergy
Imperious Perfect
59% of 15956 decks
+57% synergy
Ezuri, Renegade Leader
58% of 15956 decks
+58% synergy
Heroic Intervention
58% of 15956 decks
+45% synergy
Tyvar Kell
57% of 6714 decks
+57% synergy
Shaman of the Pack
56% of 6721 decks
+56% synergy
Creatures (50)
Elvish Warmaster
56% of 15774 decks
+55% synergy
Galadhrim Brigade
56% of 3333 decks
+54% synergy
Arbor Elf
54% of 15956 decks
+51% synergy
Wirewood Channeler
50% of 15956 decks
+49% synergy
Skemfar Shadowsage
47% of 6714 decks
+46% synergy
Canopy Tactician
46% of 15783 decks
+46% synergy
Lys Alana Huntmaster
46% of 15956 decks
+45% synergy
Tolsimir, Midnight's Light
45% of 288 decks
+44% synergy
Wirewood Symbiote
45% of 15956 decks
+44% synergy
Quirion Ranger
45% of 15956 decks
+43% synergy
Craterhoof Behemoth
44% of 15956 decks
+41% synergy
Allosaurus Shepherd
44% of 15871 decks
+43% synergy
Roaming Throne
44% of 1974 decks
+28% synergy
Poison-Tip Archer
44% of 6721 decks
+43% synergy
Elvish Champion
43% of 15956 decks
+42% synergy
Glissa Sunslayer
43% of 4388 decks
+41% synergy
Tyvar the Bellicose
42% of 3179 decks
+41% synergy
Druid of the Anima
41% of 524 decks
+40% synergy
Realmwalker
41% of 15756 decks
+38% synergy
Elvish Harbinger
38% of 15956 decks
+37% synergy
Immaculate Magistrate
37% of 15956 decks
+37% synergy
Dwynen, Gilt-Leaf Daen
37% of 15956 decks
+36% synergy
Radha, Heir to Keld
37% of 1823 decks
+36% synergy
Mirror Entity
36% of 1713 decks
+34% synergy
Deathrite Shaman
36% of 6721 decks
+34% synergy
Ruthless Winnower
36% of 6714 decks
+36% synergy
Skemfar Avenger
36% of 6714 decks
+36% synergy
Joraga Warcaller
35% of 15956 decks
+34% synergy
Elvish Visionary
34% of 15956 decks
+33% synergy
Ruby, Daring Tracker
34% of 765 decks
+33% synergy
Miara, Thorn of the Glade
33% of 6717 decks
+33% synergy
Timberwatch Elf
33% of 15956 decks
+33% synergy
Abomination of Llanowar
33% of 6717 decks
+33% synergy
Eternal Witness
32% of 15956 decks
+21% synergy
Llanowar Tribe
32% of 15941 decks
+31% synergy
Wolverine Riders
31% of 15761 decks
+30% synergy
Zhur-Taa Druid
30% of 1823 decks
+30% synergy
Copperhorn Scout
30% of 15956 decks
+30% synergy
Wood Elves
30% of 15956 decks
+26% synergy
Fauna Shaman
29% of 15956 decks
+28% synergy
Avacyn's Pilgrim
29% of 1712 decks
+26% synergy
Regal Force
28% of 15956 decks
+27% synergy
Heritage Druid
28% of 15956 decks
+28% synergy
Boreal Druid
28% of 15956 decks
+27% synergy
Seedborn Muse
28% of 15956 decks
+24% synergy
Rocco, Cabaretti Caterer
27% of 507 decks
+27% synergy
Rhys the Exiled
27% of 6721 decks
+26% synergy
Coiling Oracle
26% of 1030 decks
+24% synergy
Master Biomancer
25% of 1030 decks
+25% synergy
Joraga Treespeaker
25% of 15956 decks
+24% synergy
Instants (50)
Path to Exile
56% of 1713 decks
+36% synergy
Assassin's Trophy
53% of 6721 decks
+47% synergy
Archdruid's Charm
51% of 1221 decks
+47% synergy
Elven Ambush
46% of 15783 decks
+45% synergy
Counterspell
44% of 1031 decks
+23% synergy
Putrefy
43% of 6721 decks
+40% synergy
Galadhrim Ambush
40% of 6179 decks
+39% synergy
Boros Charm
39% of 524 decks
+33% synergy
Cyclonic Rift
39% of 1031 decks
+24% synergy
Worldly Tutor
38% of 15956 decks
+32% synergy
Chord of Calling
36% of 15956 decks
+33% synergy
Enlightened Tutor
34% of 1713 decks
+25% synergy
Swan Song
33% of 1031 decks
+25% synergy
Eladamri's Call
33% of 1712 decks
+31% synergy
Teferi's Protection
32% of 1713 decks
+23% synergy
Generous Gift
32% of 1711 decks
+20% synergy
Golgari Charm
31% of 6721 decks
+30% synergy
Chaos Warp
31% of 1823 decks
+15% synergy
Galadriel's Dismissal
31% of 706 decks
+29% synergy
Return of the Wildspeaker
31% of 15918 decks
+24% synergy
Vitalize
30% of 15956 decks
+30% synergy
Mutational Advantage
28% of 25 decks
+25% synergy
Legolas's Quick Reflexes
27% of 3333 decks
+25% synergy
Deflecting Swat
27% of 1822 decks
+19% synergy
Flawless Maneuver
27% of 1698 decks
+22% synergy
Nature's Claim
26% of 15956 decks
+21% synergy
Vampiric Tutor
26% of 6721 decks
+16% synergy
Abrupt Decay
25% of 6721 decks
+22% synergy
Comet Storm
24% of 1823 decks
+23% synergy
Veil of Summer
24% of 15935 decks
+20% synergy
Fierce Guardianship
22% of 1026 decks
+14% synergy
Negate
22% of 1031 decks
+11% synergy
An Offer You Can't Refuse
20% of 906 decks
+10% synergy
Arcane Denial
19% of 1031 decks
+10% synergy
Crop Rotation
19% of 15956 decks
+14% synergy
Growth Spiral
19% of 1029 decks
+14% synergy
Tyvar's Stand
17% of 8804 decks
+14% synergy
Dovin's Veto
16% of 408 decks
+12% synergy
Stroke of Midnight
16% of 827 decks
+9% synergy
Mystical Tutor
16% of 1031 decks
+8% synergy
Mana Drain
15% of 1031 decks
+8% synergy
Krosan Grip
15% of 15956 decks
+11% synergy
Tibalt's Trickery
15% of 1816 decks
+12% synergy
Red Elemental Blast
15% of 1823 decks
+12% synergy
Akroma's Will
15% of 1691 decks
+11% synergy
Final Showdown
15% of 27 decks
+10% synergy
Shared Summons
15% of 15929 decks
+14% synergy
Windswift Slice
15% of 6179 decks
+14% synergy
Summoner's Pact
15% of 15956 decks
+14% synergy
Kindred Summons
14% of 15956 decks
+13% synergy
Sorceries (50)
Raise the Palisade
47% of 591 decks
+45% synergy
Pact of the Serpent
46% of 6714 decks
+45% synergy
Shamanic Revelation
41% of 15956 decks
+36% synergy
Green Sun's Zenith
41% of 15956 decks
+37% synergy
Elvish Promenade
41% of 15956 decks
+40% synergy
Finale of Devastation
38% of 15942 decks
+34% synergy
Demonic Tutor
32% of 6721 decks
+19% synergy
Rally the Galadhrim
29% of 329 decks
+29% synergy
Genesis Wave
27% of 15956 decks
+25% synergy
Mists of Lórien
26% of 329 decks
+25% synergy
Casualties of War
25% of 6721 decks
+24% synergy
Fanning the Flames
24% of 1823 decks
+24% synergy
Natural Order
24% of 15956 decks
+22% synergy
Insatiable Avarice
23% of 30 decks
+17% synergy
Blasphemous Act
23% of 1823 decks
+7% synergy
Triumph of the Hordes
19% of 15956 decks
+17% synergy
Rishkar's Expertise
19% of 15956 decks
+14% synergy
Harmonize
18% of 15956 decks
+14% synergy
Cultivate
18% of 15956 decks
-4% synergy
Patriarch's Bidding
18% of 6721 decks
+16% synergy
Diabolic Intent
17% of 6721 decks
+13% synergy
Torment of Hailfire
17% of 6721 decks
+14% synergy
Last March of the Ents
17% of 6179 decks
+14% synergy
Kindred Dominance
17% of 6721 decks
+15% synergy
Overwhelming Stampede
16% of 15956 decks
+13% synergy
Jeska's Will
16% of 1818 decks
+7% synergy
Vandalblast
15% of 1823 decks
+6% synergy
Shatterskull Smashing
15% of 1819 decks
+13% synergy
Eerie Ultimatum
14% of 159 decks
+13% synergy
Preordain
14% of 1031 decks
+8% synergy
Harvest Season
14% of 15956 decks
+13% synergy
Nature's Lore
14% of 15956 decks
-1% synergy
Villainous Wealth
13% of 183 decks
+12% synergy
Gamble
13% of 1823 decks
+8% synergy
Jaya's Immolating Inferno
13% of 1823 decks
+12% synergy
Eldritch Evolution
13% of 15956 decks
+10% synergy
Rampant Growth
13% of 15956 decks
-4% synergy
Turntimber Symbiosis
13% of 15827 decks
+11% synergy
Bala Ged Recovery
12% of 15850 decks
+7% synergy
Farewell
12% of 1557 decks
+5% synergy
Toxic Deluge
12% of 6721 decks
+3% synergy
Tooth and Nail
12% of 15956 decks
+11% synergy
Pillage the Bog
11% of 35 decks
+11% synergy
Distant Melody
11% of 1031 decks
+9% synergy
Crackle with Power
11% of 1815 decks
+10% synergy
Three Visits
11% of 15956 decks
-0% synergy
Crippling Fear
11% of 6714 decks
+10% synergy
Neoform
10% of 1029 decks
+9% synergy
Austere Command
10% of 1713 decks
+4% synergy
Return Upon the Tide
10% of 6714 decks
+10% synergy
Utility Artifacts (26)
Umbral Mantle
49% of 15957 decks
+48% synergy
Lightning Greaves
37% of 15957 decks
+11% synergy
Swiftfoot Boots
28% of 15957 decks
-0% synergy
Skullclamp
27% of 15957 decks
+14% synergy
Thousand-Year Elixir
24% of 15957 decks
+22% synergy
Lifecrafter's Bestiary
18% of 15956 decks
+16% synergy
Vanquisher's Banner
18% of 15957 decks
+14% synergy
The Great Henge
18% of 15918 decks
+13% synergy
Bolas's Citadel
15% of 6721 decks
+9% synergy
Throne of the God-Pharaoh
14% of 15957 decks
+13% synergy
Coat of Arms
13% of 15957 decks
+11% synergy
Halo Fountain
13% of 1509 decks
+11% synergy
Sword of the Paruns
12% of 15957 decks
+12% synergy
Emerald Medallion
10% of 15957 decks
+9% synergy
Ozolith, the Shattered Spire
9% of 7850 decks
+6% synergy
Herald's Horn
8% of 15957 decks
+2% synergy
Silver Shroud Costume
8% of 349 decks
+4% synergy
Serpent's Soul-Jar
7% of 6714 decks
+7% synergy
Sword of Wealth and Power
7% of 71 decks
+1% synergy
The One Ring
6% of 8130 decks
-3% synergy
Door of Destinies
6% of 15957 decks
+4% synergy
Rhonas's Monument
6% of 15957 decks
+5% synergy
Cloudstone Curio
6% of 15957 decks
+5% synergy
Hammer of Purphoros
5% of 1823 decks
+5% synergy
Eldrazi Monument
5% of 15957 decks
+4% synergy
Power Fist
5% of 349 decks
+2% synergy
Enchantments (50)
Elderfang Venom
47% of 6714 decks
+46% synergy
Elven Chorus
38% of 6556 decks
+36% synergy
Prowess of the Fair
37% of 6721 decks
+37% synergy
Rhystic Study
35% of 1031 decks
+21% synergy
Guardian Project
35% of 15944 decks
+31% synergy
Aggravated Assault
34% of 1823 decks
+33% synergy
Fires of Yavimaya
33% of 1823 decks
+32% synergy
Aura Shards
32% of 1712 decks
+30% synergy
Sylvan Library
31% of 15956 decks
+25% synergy
Growing Rites of Itlimoc
30% of 15956 decks
+27% synergy
Moldervine Reclamation
27% of 6721 decks
+25% synergy
Rising of the Day
26% of 897 decks
+22% synergy
Elvish Guidance
25% of 15956 decks
+25% synergy
Concordant Crossroads
23% of 15956 decks
+22% synergy
Leyline of Abundance
22% of 15935 decks
+22% synergy
Smothering Tithe
22% of 1712 decks
+10% synergy
Tribute to the World Tree
22% of 8078 decks
+17% synergy
Intruder Alarm
21% of 1031 decks
+20% synergy
Freed from the Real
20% of 1031 decks
+19% synergy
Kindred Discovery
19% of 1031 decks
+15% synergy
Mystic Remora
19% of 1031 decks
+10% synergy
All Will Be One
18% of 1198 decks
+16% synergy
Kenrith's Transformation
18% of 15918 decks
+14% synergy
Wild Growth
18% of 15956 decks
+13% synergy
Quest for Renewal
17% of 15956 decks
+17% synergy
Cathars' Crusade
17% of 1713 decks
+14% synergy
Beastmaster Ascension
16% of 15956 decks
+14% synergy
Simic Ascendancy
16% of 1029 decks
+15% synergy
Mirari's Wake
16% of 1712 decks
+12% synergy
Anointed Procession
16% of 1713 decks
+11% synergy
Insidious Roots
15% of 296 decks
+13% synergy
Struggle for Project Purity
14% of 21 decks
+11% synergy
Binding the Old Gods
14% of 6714 decks
+13% synergy
Warleader's Call
14% of 213 decks
+9% synergy
Crown of Skemfar
13% of 15756 decks
+12% synergy
Well Rested
12% of 349 decks
+10% synergy
Pemmin's Aura
12% of 1031 decks
+11% synergy
Utopia Sprawl
11% of 15956 decks
+8% synergy
Sylvan Anthem
11% of 15514 decks
+10% synergy
Phyrexian Arena
11% of 6721 decks
+4% synergy
Doubling Season
11% of 15956 decks
+7% synergy
Pride of the Perfect
11% of 6717 decks
+11% synergy
Cultist of the Absolute
11% of 5776 decks
+10% synergy
Brokers Ascendancy
10% of 379 decks
+9% synergy
Harald Unites the Elves
9% of 6714 decks
+9% synergy
Trouble in Pairs
9% of 288 decks
+4% synergy
Lost Isle Calling
9% of 593 decks
+8% synergy
Parallel Lives
9% of 15956 decks
+5% synergy
Temur Ascendancy
8% of 106 decks
+7% synergy
Mayael's Aria
8% of 524 decks
+8% synergy
Battles (1)
Invasion of Ikoria
15% of 7850 decks
+12% synergy
Planeswalkers (4)
Freyalise, Llanowar's Fury
26% of 15956 decks
+25% synergy
Garruk, Primal Hunter
11% of 15956 decks
+10% synergy
Oko, Thief of Crowns
6% of 1029 decks
+5% synergy
Domri, Anarch of Bolas
6% of 1823 decks
+5% synergy
Utility Lands (35)
Wirewood Lodge
58% of 15956 decks
+57% synergy
Yavimaya, Cradle of Growth
49% of 15469 decks
+40% synergy
Kessig Wolf Run
35% of 1823 decks
+31% synergy
Boseiju, Who Endures
33% of 14487 decks
+23% synergy
Bojuka Bog
30% of 6721 decks
+14% synergy
Rivendell
29% of 591 decks
+25% synergy
Nykthos, Shrine to Nyx
27% of 15957 decks
+21% synergy
Rogue's Passage
25% of 15957 decks
+6% synergy
Reliquary Tower
24% of 15957 decks
-4% synergy
Castle Garenbrig
21% of 15922 decks
+18% synergy
Gavony Township
20% of 1712 decks
+18% synergy
Gaea's Cradle
19% of 15956 decks
+16% synergy
Oran-Rief, the Vastwood
17% of 15956 decks
+15% synergy
Otawara, Soaring City
17% of 929 decks
+8% synergy
Dryad Arbor
14% of 15956 decks
+12% synergy
Shizo, Death's Storehouse
14% of 6721 decks
+11% synergy
Minas Tirith
13% of 950 decks
+8% synergy
Alchemist's Refuge
13% of 1030 decks
+12% synergy
Ancient Tomb
13% of 15957 decks
+2% synergy
Raging Ravine
12% of 1823 decks
+12% synergy
Urborg, Tomb of Yawgmoth
12% of 15957 decks
+1% synergy
Takenuma, Abandoned Mire
11% of 6080 decks
+5% synergy
Restless Ridgeline
10% of 553 decks
+9% synergy
The Black Gate
8% of 2568 decks
+6% synergy
Mosswort Bridge
8% of 15956 decks
+3% synergy
Eiganjo, Seat of the Empire
7% of 1564 decks
+3% synergy
Grim Backwoods
7% of 6721 decks
+6% synergy
War Room
7% of 15817 decks
+0% synergy
Emergence Zone
6% of 15943 decks
+4% synergy
Castle Locthwain
6% of 6719 decks
+3% synergy
Restless Cottage
6% of 1590 decks
+5% synergy
Tranquil Thicket
6% of 15956 decks
+4% synergy
Skarrg, the Rage Pits
5% of 1823 decks
+4% synergy
Lonely Sandbar
5% of 1031 decks
+3% synergy
Cabal Coffers
5% of 6721 decks
-1% synergy
Mana Artifacts (15)
Sol Ring
79% of 15957 decks
-5% synergy
Arcane Signet
35% of 15919 decks
-35% synergy
Jeweled Lotus
15% of 15817 decks
+8% synergy
Mana Crypt
15% of 15957 decks
+3% synergy
Simic Signet
13% of 1030 decks
+9% synergy
Talisman of Curiosity
10% of 1029 decks
+7% synergy
Selesnya Signet
10% of 1712 decks
+8% synergy
Talisman of Resilience
9% of 6721 decks
+7% synergy
Golgari Signet
9% of 6721 decks
+6% synergy
Chrome Mox
8% of 15957 decks
+2% synergy
Talisman of Unity
8% of 1712 decks
+6% synergy
Lotus Petal
7% of 15957 decks
+1% synergy
Timeless Lotus
7% of 56 decks
+6% synergy
Gruul Signet
7% of 1823 decks
+4% synergy
Mana Vault
5% of 15957 decks
-1% synergy
Lands (50)
Temple Garden
62% of 1712 decks
+53% synergy
Llanowar Wastes
62% of 6721 decks
+57% synergy
Stomping Ground
59% of 1823 decks
+50% synergy
Command Tower
59% of 15957 decks
-14% synergy
Woodland Cemetery
57% of 6721 decks
+51% synergy
Overgrown Tomb
56% of 6721 decks
+46% synergy
Underground Mortuary
55% of 270 decks
+50% synergy
Rejuvenating Springs
55% of 1019 decks
+49% synergy
Breeding Pool
53% of 1030 decks
+44% synergy
Jetmir's Garden
52% of 506 decks
+47% synergy
Cinder Glade
51% of 1823 decks
+43% synergy
Spara's Headquarters
50% of 379 decks
+46% synergy
Undergrowth Stadium
50% of 6717 decks
+44% synergy
Sacred Foundry
50% of 524 decks
+41% synergy
Spire Garden
49% of 1823 decks
+44% synergy
Gilt-Leaf Palace
49% of 6721 decks
+48% synergy
Bountiful Promenade
48% of 1712 decks
+43% synergy
Hallowed Fountain
48% of 408 decks
+39% synergy
Hinterland Harbor
47% of 1030 decks
+42% synergy
Canopy Vista
46% of 1712 decks
+39% synergy
Yavimaya Coast
44% of 1030 decks
+39% synergy
Rockfall Vale
43% of 1800 decks
+38% synergy
Rootbound Crag
43% of 1823 decks
+38% synergy
Karplusan Forest
43% of 1823 decks
+39% synergy
Sunpetal Grove
42% of 1712 decks
+38% synergy
Deathcap Glade
39% of 6262 decks
+35% synergy
Viridescent Bog
39% of 127 decks
+35% synergy
Spectator Seating
37% of 522 decks
+31% synergy
Sea of Clouds
36% of 408 decks
+30% synergy
Golgari Rot Farm
35% of 6721 decks
+31% synergy
Path of Ancestry
35% of 15957 decks
+15% synergy
Overgrown Farmland
35% of 1632 decks
+31% synergy
Darkbore Pathway
35% of 6714 decks
+33% synergy
Godless Shrine
34% of 160 decks
+25% synergy
Ziatora's Proving Ground
34% of 123 decks
+31% synergy
Brushland
34% of 1712 decks
+31% synergy
Flooded Grove
33% of 1030 decks
+30% synergy
Indatha Triome
32% of 159 decks
+29% synergy
Dreamroot Cascade
32% of 947 decks
+28% synergy
Seaside Citadel
32% of 407 decks
+29% synergy
Watery Grave
30% of 183 decks
+19% synergy
Hedge Maze
30% of 54 decks
+25% synergy
Necroblossom Snarl
29% of 6590 decks
+27% synergy
Jungle Shrine
29% of 524 decks
+25% synergy
Game Trail
29% of 1823 decks
+26% synergy
Cragcrown Pathway
28% of 1820 decks
+25% synergy
Vineglimmer Snarl
28% of 1012 decks
+26% synergy
Twilight Mire
28% of 6721 decks
+26% synergy
Zagoth Triome
26% of 182 decks
+22% synergy
Battlefield Forge
26% of 524 decks
+20% synergy