Ulalek rewards casting Eldrazi spells. For {C}{C} it copies every spell the player controls and every other triggered and activated ability on the stack, so the big cast triggers (annihilating titans, Benthic Anomaly, Oblivion Sower, World Breaker, Artisan of Kozilek) and the colorless payoffs all get doubled. The deck ramps hard into colorless mana with rocks, land ramp, Spawn and Scion tokens, and colorless-producing lands. Cost reducers and colorless-matters engines then let it chain Eldrazi spells and turn each one into a wave of copied value. How it wins: It lands and copies huge Eldrazi with annihilator and cast triggers to overwhelm the table in combat, or loops Ulalek, Glaring Fleshraker and Echoes of Eternity into endless Spawn and Fleshraker damage. Key roles: - Colorless mana and Spawn ramp: Mana rocks, colorless lands and Spawn or Scion token makers supply the extra {C}{C} for Ulalek's copies and power out expensive titans. The tokens double as fodder for Eldrazi sacrifice payoffs. (Ultima, Origin of Oblivion, Awakening Zone, Writhing Chrysalis) - Cost reduction and chaining: These effects make colorless spells cheaper, so several Eldrazi and Ulalek copies fit into one turn, and they draw cards off big casts to keep the chain going. (Ugin, the Ineffable, Herald of Kozilek, Kozilek's Unsealing) - Cast-trigger value to copy: Eldrazi whose payoff happens on cast, which Ulalek and Echoes of Eternity duplicate into multiple removal pieces, reanimations, stolen lands or cloned creatures. (Benthic Anomaly, World Breaker, Oblivion Sower) - Copy and trigger-doubling engine: Extra copies of colorless spells and doubled colorless triggers stack with Ulalek. With Glaring Fleshraker, each cast creates a self-feeding loop of Spawn tokens and damage pings. (Echoes of Eternity, Glaring Fleshraker) - Annihilator finishers: Massive Eldrazi strip opponents' boards each attack, backed by haste and evasion granted to the team. (Ulamog's Crusher, Artisan of Kozilek, Eldrazi Conscription) - Colorless-exempt interaction: Removal and sweepers that punish colored permanents while sparing the deck's colorless board. (Selective Obliteration, Kozilek's Return, Titan's Presence)

Ulalek, Fused Atrocity decklist

• Abstruse Appropriation
• Ancient Stirrings
• Angelic Aberration
• Arcane Signet
• Artisan of Kozilek
• Ash Barrens
• Awakening Zone
• Azlask, the Swelling Scourge
• Benthic Anomaly
• Breaker of Creation
• Chittering Dispatcher
• Command Tower
• Commander's Sphere
• Corrupted Crossroads
• Cultivate
• Deepfathom Skulker
• Dreamstone Hedron
• Drowner of Hope
• Drowner of Truth
• Echoes of Eternity
• Elder Deep-Fiend
• Eldrazi Conscription
• Eldrazi Displacer
• Eldrazi Linebreaker
• Endbringer
• Everflowing Chalice
• Exotic Orchard
• 6× Forest
• Glaring Fleshraker
• Hedron Archive
• Herald of Kozilek
• Hope-Ender Coatl
• Idol of False Gods
• Imprisoned in the Moon
• 5× Island
• It That Heralds the End
• Kozilek's Return
• Kozilek's Unsealing
• Mind Stone
• 4× Mountain
• Null Elemental Blast
• Oblivion Sower
• Path of Ancestry
• 3× Plains
• Rampant Growth
• Ruins of Oran-Rief
• Secluded Courtyard
• Selective Obliteration
• Shrine of the Forsaken Gods
• Sire of Stagnation
• Skittering Invasion
• Snapping Voidcraw
• Sol Ring
• Spawning Bed
• 5× Swamp
• Sylvan Scrying
• Talisman of Impulse
• Tectonic Edge
• Temple of the False God
• Thief of Existence
• Titan's Presence
• Titans' Vanguard
• Tranquil Landscape
• Ugin's Insight
• Ugin, the Ineffable
• Ulamog's Crusher
• Ulamog's Nullifier
• Ultima, Origin of Oblivion
• Unclaimed Territory
• Unfathomable Truths
• Vile Redeemer
• Warping Wail
• Wastescape Battlemage
• World Breaker
• Worn Powerstone
• Writhing Chrysalis
• Bismuth Mindrender
• Twins of Discord
• Tomb of the Spirit Dragon
• Crib Swap
• Inversion Behemoth