Overview:

This 5-color colorless Eldrazi deck helmed by Ulalek, Fused Atrocity focuses on explosive mana acceleration to deploy massive Eldrazi threats while leveraging copy effects to multiply spell/ability triggers. The strategy revolves around cost-reduction enablers like Herald of Kozilek and It That Heralds the End to cheat out game-ending Eldrazi titans, supported by token generators (Kozilek's Unsealing, Awakening Zone) for ramp. Ulalek serves as both a value engine and win condition enabler - its copy ability synergizes with the deck's numerous enters-the-battlefield triggers and token producers, while flash enablers like Vedalken Orrery maximize copying opportunities.

Primer:

Core Strategy Execution:

1. Early Setup (Turns 1-4):
   • Deploy mana rocks (Sol Ring, Thran Dynamo) and cost reducers (Herald of Kozilek, It That Heralds the End)
   • Establish token engines (Awakening Zone, Sifter of Skulls) for ramp
   • Cast flash enablers (Leyline of Anticipation, Liberator, Urza's Battlethopter) to enable reactive play

2. Midgame Power Plays (Turns 5-7):

   • Cast Ulalek with copy fuel (Strionic Resonator, Lithoform Engine)
   • Deploy mid-sized Eldrazi (Deepfathom Skulker, Drowner of Hope) to generate value tokens
   • Use Forsaken Monument to supercharge mana and creature stats

3. Endgame Dominance (Turns 8+):

   • Drop titans (Ulamog, the Infinite Gyre, Kozilek, the Great Distortion) with copy triggers
   • Activate Planar Bridge to cheat in game-enders
   • Overwhelm with token armies amplified by Eldrazi Monument or Titans' Vanguard

Mulligan Priorities:

• Keep hands with 2-3 lands including colorless sources
• Prioritize early ramp (Sol Ring, Herald of Kozilek) or token generators
• Look for cost reducers paired with flash enablers
• Avoid hands with only high-CMC spells lacking setup

Key Tips:

• Time Ulalek casts to maximize copy triggers - pair with instant-speed Eldrazi via flash enablers
• Use Eldrazi Displacer to reset ETB triggers on demand
• Echoes of Eternity doubles both cast triggers and permanent ETBs
• Protect key pieces with Eldritch Immunity and Imprisoned in the Moon
• All Is Dust clears the board while preserving your colorless threats

Weaknesses:

Critical

• Extreme vulnerability to early stax pieces (Null Rod, Collector Ouphe) shutting off artifact ramp
• No protection against countermagic outside Ulamog's Nullifier
• Heavy reliance on commander for copy value makes it susceptible to repeated removal

Moderate

• Slow recovery from board wipes due to high average CMC
• Limited instant-speed interaction for threats resolving after Ulalek's copy window
• Colorless identity struggles with permanent-based answers to enchantments

Minor

• Some mana inconsistency from painland-heavy base
• Token strategies vulnerable to mass -1/-1 effects
• Limited graveyard recursion beyond Spawnbed Protector

Most Important Cards:

• Ulalek, Fused Atrocity (Copy engine/win condition)
• Forsaken Monument (Mana amplification + anthem)
• Planar Bridge (Tutor any permanent)
• Echoes of Eternity (Trigger/cast doubler)
• Herald of Kozilek (Critical cost reduction)
• The Great Henge (Card draw + counters)
• Kozilek's Unsealing (Token/card advantage engine)
• All Is Dust (One-sided board wipe)
• Eldrazi Temple (Mana acceleration)
• Liberator, Urza's Battlethopter (Flash enabler)

Attribute Ratings:

Speed: 6/10

• Can deploy game-ending threats as early as T5-6 with optimal draws, but average play patterns land in T7-8 due to high CMC density.

Resilience: 5/10

• Limited protection suite and high commander dependency create fragility, though some recursion (Spawnbed Protector, Artisan of Kozilek) provides recovery.

Consistency: 7/10

• Strong tutor effects (Planar Bridge, Ancient Stirrings) and card draw (The Great Henge, Deepfathom Skulker) compensate for high variance threats.

Interaction: 4/10

• Reactive options limited to niche answers (Ugin's Binding, Warping Wail), though All Is Dust provides powerful reset potential.

Rating Justification:

This deck demonstrates focused power through explosive mana and copy synergies, capable of T7-8 wins via overwhelming board states. While packing strong individual cards and synergies, its vulnerability to early interaction and commander dependency prevent higher optimization. Aligns with High-Power Casual benchmarks.

Power level: 5.5 - 6.0