Volrath, the Shapestealer (Commander) - Midrange

Background image for The Top 10 Non-Marvel Spiders in Magic: The Gathering
Josh Nelson
Sep 8, 2025
The Top 10 Non-Marvel Spiders in Magic: The Gathering
Spiders are some of the most true-to-reality creatures in Magic: The Gathering. Let's look at the top 10 best Spiders in the game!
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Generous Patron
60%inclusion18 decks30 decks
59%synergy
Forgotten Ancient
50%inclusion15 decks30 decks
45%synergy
Master Biomancer
43%inclusion13 decks30 decks
40%synergy
Hapatra, Vizier of Poisons
40%inclusion12 decks30 decks
39%synergy
Persistent Constrictor
39%inclusion9 decks23 decks
39%synergy
Champion of Lambholt
40%inclusion12 decks30 decks
38%synergy
Karn's Bastion
43%inclusion13 decks30 decks
36%synergy
Cold-Eyed Selkie
43%inclusion13 decks30 decks
35%synergy
Assassin's Trophy
70%inclusion21 decks30 decks
34%synergy
Spitting Dilophosaurus
33%inclusion10 decks30 decks
33%synergy
Top Cards
Cultivate
40%inclusion12 decks30 decks
-2%synergy
An Offer You Can't Refuse
37%inclusion11 decks30 decks
16%synergy
Beast Within
37%inclusion11 decks30 decks
8%synergy
Toxic Deluge
37%inclusion11 decks30 decks
18%synergy
Birds of Paradise
37%inclusion11 decks30 decks
6%synergy
Three Visits
33%inclusion10 decks30 decks
9%synergy
The Great Henge
33%inclusion10 decks30 decks
27%synergy
Black Sun's Zenith
30%inclusion9 decks30 decks
28%synergy
Tribute to the World Tree
30%inclusion9 decks30 decks
27%synergy
Nature's Lore
30%inclusion9 decks30 decks
2%synergy
Game Changers
Ancient Tomb
23%inclusion7 decks30 decks
14%synergy
Rhystic Study
20%inclusion6 decks30 decks
-1%synergy
Cyclonic Rift
20%inclusion6 decks30 decks
-1%synergy
Worldly Tutor
20%inclusion6 decks30 decks
11%synergy
Vampiric Tutor
20%inclusion6 decks30 decks
7%synergy
Demonic Tutor
17%inclusion5 decks30 decks
-1%synergy
Force of Will
13%inclusion4 decks30 decks
5%synergy
Fierce Guardianship
13%inclusion4 decks30 decks
-2%synergy
Opposition Agent
10%inclusion3 decks30 decks
4%synergy
Chrome Mox
10%inclusion3 decks30 decks
4%synergy
Creatures
Biophagus
30%inclusion9 decks30 decks
28%synergy
Yawgmoth, Thran Physician
30%inclusion9 decks30 decks
28%synergy
Pollywog Prodigy
28%inclusion7 decks25 decks
23%synergy
Deathrite Shaman
27%inclusion8 decks30 decks
11%synergy
Spark Double
27%inclusion8 decks30 decks
22%synergy
Obelisk Spider
27%inclusion8 decks30 decks
26%synergy
Incubation Druid
23%inclusion7 decks30 decks
20%synergy
Necroskitter
23%inclusion7 decks30 decks
23%synergy
Danny Pink
23%inclusion7 decks30 decks
20%synergy
Vashta Nerada
23%inclusion7 decks30 decks
22%synergy
Evolution Sage
23%inclusion7 decks30 decks
15%synergy
Massacre Girl, Known Killer
23%inclusion7 decks30 decks
23%synergy
Evolution Witness
22%inclusion6 decks27 decks
17%synergy
Giggling Skitterspike
22%inclusion5 decks23 decks
20%synergy
Bloated Contaminator
20%inclusion6 decks30 decks
19%synergy
Tetzimoc, Primal Death
20%inclusion6 decks30 decks
19%synergy
Rishkar, Peema Renegade
20%inclusion6 decks30 decks
19%synergy
Scute Swarm
20%inclusion6 decks30 decks
8%synergy
Toxrill, the Corrosive
20%inclusion6 decks30 decks
17%synergy
Cankerbloom
20%inclusion6 decks30 decks
13%synergy
Skithiryx, the Blight Dragon
20%inclusion6 decks30 decks
19%synergy
Blighted Agent
20%inclusion6 decks30 decks
18%synergy
Ouroboroid
18%inclusion3 decks17 decks
15%synergy
Plague Stinger
17%inclusion5 decks30 decks
16%synergy
Eternal Witness
17%inclusion5 decks30 decks
-11%synergy
Phyrexian Metamorph
17%inclusion5 decks30 decks
12%synergy
Viral Drake
17%inclusion5 decks30 decks
16%synergy
Phyrexian Crusader
17%inclusion5 decks30 decks
16%synergy
Fathom Mage
17%inclusion5 decks30 decks
12%synergy
Faerie Mastermind
17%inclusion5 decks30 decks
13%synergy
Glasspool Mimic
17%inclusion5 decks30 decks
14%synergy
Sakura-Tribe Elder
17%inclusion5 decks30 decks
-7%synergy
Ledger Shredder
17%inclusion5 decks30 decks
13%synergy
Ichor Rats
17%inclusion5 decks30 decks
16%synergy
Naga Fleshcrafter
15%inclusion3 decks20 decks
13%synergy
Springheart Nantuko
15%inclusion4 decks27 decks
11%synergy
Cathedral Acolyte
14%inclusion4 decks29 decks
10%synergy
Undercover Operative
13%inclusion4 decks30 decks
13%synergy
Bloom Tender
13%inclusion4 decks30 decks
6%synergy
Tyranid Prime
13%inclusion4 decks30 decks
13%synergy
Elves of Deep Shadow
13%inclusion4 decks30 decks
5%synergy
Herald of Secret Streams
13%inclusion4 decks30 decks
7%synergy
Clone
13%inclusion4 decks30 decks
13%synergy
Xavier Sal, Infested Captain
13%inclusion4 decks30 decks
13%synergy
Plaxcaster Frogling
13%inclusion4 decks30 decks
12%synergy
Sakashima of a Thousand Faces
13%inclusion4 decks30 decks
12%synergy
Spawnwrithe
13%inclusion4 decks30 decks
13%synergy
Managorger Hydra
13%inclusion4 decks30 decks
10%synergy
Contaminant Grafter
13%inclusion4 decks30 decks
13%synergy
Phantasmal Image
13%inclusion4 decks30 decks
11%synergy
Instants
Revitalizing Repast
41%inclusion11 decks27 decks
33%synergy
Counterspell
27%inclusion8 decks30 decks
-8%synergy
Abrupt Decay
23%inclusion7 decks30 decks
12%synergy
Heroic Intervention
23%inclusion7 decks30 decks
2%synergy
Repulsive Mutation
20%inclusion6 decks30 decks
15%synergy
Return of the Wildspeaker
17%inclusion5 decks30 decks
13%synergy
Growth Spiral
17%inclusion5 decks30 decks
0%synergy
Brainstorm
17%inclusion5 decks30 decks
10%synergy
Stubborn Denial
17%inclusion5 decks30 decks
15%synergy
Prologue to Phyresis
17%inclusion5 decks30 decks
15%synergy
Ripples of Potential
17%inclusion5 decks30 decks
13%synergy
Tear Asunder
17%inclusion5 decks30 decks
6%synergy
Mana Drain
17%inclusion5 decks30 decks
5%synergy
Swan Song
17%inclusion5 decks30 decks
2%synergy
Tainted Strike
17%inclusion5 decks30 decks
16%synergy
Mutational Advantage
14%inclusion4 decks29 decks
4%synergy
Deadly Rollick
13%inclusion4 decks30 decks
0%synergy
Rapid Hybridization
13%inclusion4 decks30 decks
9%synergy
Snakeskin Veil
13%inclusion4 decks30 decks
9%synergy
Archdruid's Charm
13%inclusion4 decks30 decks
11%synergy
Tyvar's Stand
13%inclusion4 decks30 decks
10%synergy
Infectious Bite
13%inclusion4 decks30 decks
12%synergy
Inspiring Call
13%inclusion4 decks30 decks
2%synergy
Malakir Rebirth
13%inclusion4 decks30 decks
9%synergy
Arcane Denial
13%inclusion4 decks30 decks
-1%synergy
Force of Negation
13%inclusion4 decks30 decks
7%synergy
March of Swirling Mist
13%inclusion4 decks30 decks
11%synergy
Sink into Stupor
11%inclusion3 decks27 decks
4%synergy
Atomize
10%inclusion3 decks29 decks
0%synergy
Veil of Summer
10%inclusion3 decks30 decks
4%synergy
Pongify
10%inclusion3 decks30 decks
6%synergy
Gaea's Gift
10%inclusion3 decks30 decks
9%synergy
Experimental Augury
10%inclusion3 decks30 decks
7%synergy
Snuff Out
10%inclusion3 decks30 decks
8%synergy
Vraska's Fall
10%inclusion3 decks30 decks
9%synergy
Negate
10%inclusion3 decks30 decks
-7%synergy
Auroral Procession
10%inclusion2 decks20 decks
5%synergy
Dark Ritual
10%inclusion3 decks30 decks
-3%synergy
Force of Vigor
10%inclusion3 decks30 decks
7%synergy
Nature's Claim
10%inclusion3 decks30 decks
5%synergy
Reality Shift
10%inclusion3 decks30 decks
5%synergy
Noxious Revival
10%inclusion3 decks30 decks
2%synergy
Putrefy
10%inclusion3 decks30 decks
-15%synergy
Long River's Pull
7.7%inclusion2 decks26 decks
6%synergy
The Spot's Portal
7.7%inclusion1 decks13 decks
8%synergy
Fell the Profane
7.4%inclusion2 decks27 decks
0%synergy
Three Steps Ahead
6.9%inclusion2 decks29 decks
5%synergy
Fleeting Reflection
6.9%inclusion2 decks29 decks
7%synergy
Essence Capture
6.7%inclusion2 decks30 decks
6%synergy
See Double
6.7%inclusion2 decks30 decks
6%synergy
Sorceries
Reanimate
30%inclusion9 decks30 decks
8%synergy
Tezzeret's Gambit
27%inclusion8 decks30 decks
23%synergy
Kodama's Reach
23%inclusion7 decks30 decks
-1%synergy
Farseek
23%inclusion7 decks30 decks
-22%synergy
Bala Ged Recovery
23%inclusion7 decks30 decks
14%synergy
Season of Gathering
19%inclusion5 decks26 decks
18%synergy
Diabolic Intent
17%inclusion5 decks30 decks
12%synergy
Infectious Inquiry
17%inclusion5 decks30 decks
16%synergy
Finale of Devastation
17%inclusion5 decks30 decks
10%synergy
Rampant Growth
17%inclusion5 decks30 decks
-21%synergy
Will of the Temur
15%inclusion3 decks20 decks
15%synergy
Eldritch Evolution
13%inclusion4 decks30 decks
8%synergy
Phyresis Outbreak
13%inclusion4 decks30 decks
13%synergy
Rishkar's Expertise
13%inclusion4 decks30 decks
11%synergy
Doppelgang
13%inclusion4 decks30 decks
10%synergy
Rite of Replication
13%inclusion4 decks30 decks
11%synergy
Season of Weaving
12%inclusion3 decks26 decks
11%synergy
Relm's Sketching
11%inclusion2 decks18 decks
11%synergy
Unnatural Restoration
10%inclusion3 decks30 decks
6%synergy
Green Sun's Zenith
10%inclusion3 decks30 decks
7%synergy
Mythos of Brokkos
10%inclusion3 decks30 decks
7%synergy
Culling Ritual
10%inclusion3 decks30 decks
-4%synergy
Quantum Misalignment
10%inclusion3 decks30 decks
9%synergy
Contentious Plan
10%inclusion3 decks30 decks
8%synergy
Neoform
10%inclusion3 decks30 decks
6%synergy
Sea Gate Restoration
10%inclusion3 decks30 decks
8%synergy
Damnation
10%inclusion3 decks30 decks
1%synergy
Drown in Ichor
10%inclusion3 decks30 decks
8%synergy
Regrowth
10%inclusion3 decks30 decks
7%synergy
Villainous Wealth
10%inclusion3 decks30 decks
-8%synergy
Wave Goodbye
6.7%inclusion2 decks30 decks
4%synergy
Unmarked Grave
6.7%inclusion2 decks30 decks
5%synergy
Diabolic Tutor
6.7%inclusion2 decks30 decks
3%synergy
Gitaxian Probe
6.7%inclusion2 decks30 decks
5%synergy
Stolen Identity
6.7%inclusion2 decks30 decks
6%synergy
Skyshroud Claim
6.7%inclusion2 decks30 decks
1%synergy
Turntimber Symbiosis
6.7%inclusion2 decks30 decks
6%synergy
Agadeem's Awakening
6.7%inclusion2 decks30 decks
4%synergy
Treasure Cruise
6.7%inclusion2 decks30 decks
1%synergy
Lórien Revealed
6.7%inclusion2 decks30 decks
6%synergy
Quasiduplicate
6.7%inclusion2 decks30 decks
6%synergy
Buried Alive
6.7%inclusion2 decks30 decks
-1%synergy
Repudiate // Replicate
6.7%inclusion2 decks30 decks
6%synergy
Smell Fear
6.7%inclusion2 decks30 decks
6%synergy
Vivisurgeon's Insight
6.7%inclusion2 decks30 decks
6%synergy
Uncage the Menagerie
6.7%inclusion2 decks30 decks
7%synergy
Open the Way
6.7%inclusion2 decks30 decks
3%synergy
Zero Point Ballad
6.3%inclusion1 decks16 decks
5%synergy
Death Begets Life
5.0%inclusion1 decks20 decks
-1%synergy
Utility Artifacts
Ozolith, the Shattered Spire
20%inclusion6 decks30 decks
17%synergy
Swiftfoot Boots
20%inclusion6 decks30 decks
-5%synergy
Lightning Greaves
17%inclusion5 decks30 decks
-6%synergy
Contagion Engine
10%inclusion3 decks30 decks
8%synergy
Agatha's Soul Cauldron
10%inclusion3 decks30 decks
8%synergy
Bow of Nylea
6.7%inclusion2 decks30 decks
6%synergy
The One Ring
6.7%inclusion2 decks30 decks
-1%synergy
Mirror Box
6.7%inclusion2 decks30 decks
6%synergy
Contagion Clasp
6.7%inclusion2 decks30 decks
3%synergy
Trailblazer's Boots
6.7%inclusion2 decks30 decks
4%synergy
Wishclaw Talisman
6.7%inclusion2 decks30 decks
2%synergy
Shadowspear
6.7%inclusion2 decks30 decks
5%synergy
Maskwood Nexus
6.7%inclusion2 decks30 decks
6%synergy
Fireshrieker
6.7%inclusion2 decks30 decks
3%synergy
The Earth Crystal
5.6%inclusion1 decks18 decks
2%synergy
Enchantments
Innkeeper's Talent
27%inclusion7 decks26 decks
22%synergy
Hollowmurk Siege
20%inclusion4 decks20 decks
15%synergy
Mystic Remora
20%inclusion6 decks30 decks
3%synergy
Phyrexian Arena
20%inclusion6 decks30 decks
14%synergy
Nest of Scarabs
17%inclusion5 decks30 decks
16%synergy
Blowfly Infestation
17%inclusion5 decks30 decks
16%synergy
Court of Garenbrig
13%inclusion4 decks30 decks
12%synergy
Garruk's Uprising
13%inclusion4 decks30 decks
6%synergy
Guardian Project
10%inclusion3 decks30 decks
-1%synergy
Wilderness Reclamation
10%inclusion3 decks30 decks
5%synergy
Hadana's Climb
10%inclusion3 decks30 decks
8%synergy
Animate Dead
10%inclusion3 decks30 decks
-3%synergy
Web of Life and Destiny
7.7%inclusion1 decks13 decks
8%synergy
Impostor Syndrome
7.7%inclusion1 decks13 decks
6%synergy
Dance of the Dead
6.7%inclusion2 decks30 decks
5%synergy
Metamorphic Alteration
6.7%inclusion2 decks30 decks
7%synergy
Crumbling Ashes
6.7%inclusion2 decks30 decks
6%synergy
Carpet of Flowers
6.7%inclusion2 decks30 decks
3%synergy
Inexorable Tide
6.7%inclusion2 decks30 decks
-2%synergy
Necromancy
6.7%inclusion2 decks30 decks
3%synergy
Tolarian Contempt
6.7%inclusion2 decks30 decks
7%synergy
Greater Good
6.7%inclusion2 decks30 decks
4%synergy
Defense of the Heart
6.7%inclusion2 decks30 decks
5%synergy
Propaganda
6.7%inclusion2 decks30 decks
1%synergy
Flourishing Defenses
6.7%inclusion2 decks30 decks
7%synergy
Weftwalking
6.3%inclusion1 decks16 decks
6%synergy
Terrasymbiosis
5.9%inclusion1 decks17 decks
1%synergy
Sphere Grid
5.3%inclusion1 decks19 decks
3%synergy
Awaken the Honored Dead
5.0%inclusion1 decks20 decks
-4%synergy
Battles
Invasion of Ikoria
6.7%inclusion2 decks30 decks
5%synergy
Planeswalkers
Vraska, Betrayal's Sting
17%inclusion5 decks30 decks
14%synergy
Oko, Thief of Crowns
10%inclusion3 decks30 decks
6%synergy
Oko, the Ringleader
6.9%inclusion2 decks29 decks
6%synergy
Jiang Yanggu, Wildcrafter
6.7%inclusion2 decks30 decks
6%synergy
Ashiok, Dream Render
6.7%inclusion2 decks30 decks
2%synergy
Utility Lands
Boseiju, Who Endures
43%inclusion13 decks30 decks
22%synergy
Otawara, Soaring City
37%inclusion11 decks30 decks
21%synergy
Yavimaya, Cradle of Growth
27%inclusion8 decks30 decks
7%synergy
Takenuma, Abandoned Mire
23%inclusion7 decks30 decks
12%synergy
Rogue's Passage
23%inclusion7 decks30 decks
5%synergy
Volrath's Stronghold
20%inclusion6 decks30 decks
19%synergy
Nesting Grounds
20%inclusion6 decks30 decks
13%synergy
Reliquary Tower
17%inclusion5 decks30 decks
-12%synergy
Urborg, Tomb of Yawgmoth
17%inclusion5 decks30 decks
-1%synergy
Shifting Woodland
15%inclusion4 decks27 decks
2%synergy
Bojuka Bog
13%inclusion4 decks30 decks
-12%synergy
Llanowar Reborn
13%inclusion4 decks30 decks
12%synergy
Alchemist's Refuge
10%inclusion3 decks30 decks
5%synergy
Inkmoth Nexus
10%inclusion3 decks30 decks
9%synergy
Thespian's Stage
10%inclusion3 decks30 decks
4%synergy
Oran-Rief, the Vastwood
10%inclusion3 decks30 decks
9%synergy
Phyrexian Tower
6.7%inclusion2 decks30 decks
2%synergy
Creeping Tar Pit
6.7%inclusion2 decks30 decks
5%synergy
Grasping Dunes
6.7%inclusion2 decks30 decks
7%synergy
Urza's Saga
6.7%inclusion2 decks30 decks
2%synergy
Gaea's Cradle
6.7%inclusion2 decks30 decks
2%synergy
Command Beacon
6.7%inclusion2 decks30 decks
-4%synergy
Minas Morgul, Dark Fortress
6.7%inclusion2 decks30 decks
6%synergy
Cephalid Coliseum
6.7%inclusion2 decks30 decks
-1%synergy
Dryad Arbor
6.7%inclusion2 decks30 decks
4%synergy
Multiversal Passage
6.7%inclusion1 decks15 decks
6%synergy
Eden, Seat of the Sanctum
5.6%inclusion1 decks18 decks
5%synergy
Mana Artifacts
Sol Ring
73%inclusion22 decks30 decks
-9%synergy
Arcane Signet
63%inclusion19 decks30 decks
-8%synergy
Simic Signet
20%inclusion6 decks30 decks
9%synergy
Talisman of Dominance
17%inclusion5 decks30 decks
0%synergy
Golgari Signet
13%inclusion4 decks30 decks
4%synergy
Dimir Signet
13%inclusion4 decks30 decks
4%synergy
Fellwar Stone
13%inclusion4 decks30 decks
-2%synergy
Glistening Sphere
10%inclusion3 decks30 decks
9%synergy
Lotus Petal
10%inclusion3 decks30 decks
1%synergy
Talisman of Resilience
10%inclusion3 decks30 decks
-6%synergy
Talisman of Curiosity
10%inclusion3 decks30 decks
-7%synergy
Mox Diamond
10%inclusion3 decks30 decks
5%synergy
Replicating Ring
6.7%inclusion2 decks30 decks
4%synergy
Chromatic Lantern
6.7%inclusion2 decks30 decks
0%synergy
Thought Vessel
6.7%inclusion2 decks30 decks
-2%synergy
Victory Chimes
6.7%inclusion2 decks30 decks
7%synergy
Midnight Clock
6.7%inclusion2 decks30 decks
6%synergy
Lands
Island
100%inclusion30 decks30 decks
10%synergy
Command Tower
97%inclusion29 decks30 decks
6%synergy
Forest
97%inclusion29 decks30 decks
6%synergy
Swamp
93%inclusion28 decks30 decks
4%synergy
Exotic Orchard
57%inclusion17 decks30 decks
1%synergy
Overgrown Tomb
57%inclusion17 decks30 decks
11%synergy
Breeding Pool
53%inclusion16 decks30 decks
8%synergy
Zagoth Triome
53%inclusion16 decks30 decks
15%synergy
Hinterland Harbor
50%inclusion15 decks30 decks
4%synergy
Watery Grave
50%inclusion15 decks30 decks
6%synergy
Verdant Catacombs
47%inclusion14 decks30 decks
12%synergy
Rejuvenating Springs
47%inclusion14 decks30 decks
15%synergy
Dreamroot Cascade
47%inclusion14 decks30 decks
19%synergy
Polluted Delta
47%inclusion14 decks30 decks
12%synergy
Misty Rainforest
43%inclusion13 decks30 decks
9%synergy
Revitalizing Repast
41%inclusion11 decks27 decks
33%synergy
Yavimaya Coast
40%inclusion12 decks30 decks
12%synergy
Woodland Cemetery
40%inclusion12 decks30 decks
-4%synergy
Llanowar Wastes
37%inclusion11 decks30 decks
5%synergy
Undergrowth Stadium
37%inclusion11 decks30 decks
7%synergy
Sunken Hollow
37%inclusion11 decks30 decks
-1%synergy
Opulent Palace
37%inclusion11 decks30 decks
-16%synergy
Foreboding Landscape
33%inclusion9 decks27 decks
10%synergy
Hedge Maze
33%inclusion10 decks30 decks
14%synergy
Underground Sea
27%inclusion8 decks30 decks
13%synergy
Tropical Island
27%inclusion8 decks30 decks
13%synergy
Bayou
27%inclusion8 decks30 decks
13%synergy
Morphic Pool
27%inclusion8 decks30 decks
1%synergy
Deathcap Glade
27%inclusion8 decks30 decks
12%synergy
Willowrush Verge
24%inclusion5 decks21 decks
16%synergy
Reflecting Pool
23%inclusion7 decks30 decks
17%synergy
Drowned Catacomb
23%inclusion7 decks30 decks
-10%synergy
Underground Mortuary
23%inclusion7 decks30 decks
5%synergy
Underground River
23%inclusion7 decks30 decks
6%synergy
Bala Ged Recovery
23%inclusion7 decks30 decks
14%synergy
Undercity Sewers
20%inclusion6 decks30 decks
3%synergy
Windswept Heath
20%inclusion6 decks30 decks
10%synergy
Shipwreck Marsh
20%inclusion6 decks30 decks
4%synergy
Wooded Foothills
20%inclusion6 decks30 decks
10%synergy
Path of Ancestry
20%inclusion6 decks30 decks
1%synergy
Marsh Flats
20%inclusion6 decks30 decks
11%synergy
Wastewood Verge
19%inclusion4 decks21 decks
11%synergy
Simic Growth Chamber
17%inclusion5 decks30 decks
-2%synergy
Fabled Passage
17%inclusion5 decks30 decks
1%synergy
Golgari Rot Farm
17%inclusion5 decks30 decks
-4%synergy
Dimir Aqueduct
17%inclusion5 decks30 decks
0%synergy
Glasspool Mimic
17%inclusion5 decks30 decks
14%synergy
Flooded Grove
17%inclusion5 decks30 decks
4%synergy
Prismatic Vista
13%inclusion4 decks30 decks
8%synergy
Waterlogged Grove
13%inclusion4 decks30 decks
8%synergy