Overview:

This 5-color Eldrazi deck helmed by Ulalek, Fused Atrocity focuses on casting massive colorless threats and amplifying their impact through spell/ability duplication. The strategy leverages cost-reduction effects like Herald of Kozilek and Eldrazi Temple to deploy game-ending Eldrazi like Ulamog, the Ceaseless Hunger and Emrakul, the Promised End, while Ulalek's copy engine creates exponential value from their cast/attack triggers. Secondary win conditions include Eldrazi Monument-enhanced combat, All Is Dust board dominance, and Forsaken Monument mana scaling.

Primer:

Core Strategy Execution:

1. Early Setup (T1-4): Prioritize ramp (Sol Ring, Cultivate, Conduit of Ruin) and cost reducers (Herald of Kozilek, It That Heralds the End). Use Secluded Courtyard/Unclaimed Territory to fix for Ulalek's WUBRG cost.
2. Midgame Acceleration (T5-7): Deploy key enablers like Eye of Ugin, Forsaken Monument, or The Great Henge. Cast mid-sized Eldrazi (Endbringer, World Breaker) to trigger Ulalek's copy ability and generate value.
3. Endgame Dominance (T7+): Resolve titans like Ulamog, the Infinite Gyre with Ulalek online to double annihilator triggers. Use Planar Bridge/Sanctum of Ugin to chain Eldrazi. Activate Lithoform Engine with Ulalek for quadrupled triggers.

Mulligan Priorities:

• Keep hands with 3+ lands including color fixing (triomes, painlands)
• Prioritize early ramp (Sol Ring, Talismans) or cost reducers
• Ensure access to WUBRG for Ulalek by midgame
• Reject hands with only high-CMC cards and no ramp

Key Tips:

• Time Ulalek casts to maximize copies of Eldrazi cast triggers
• Use Vedalken Orrery/Leyline of Anticipation to flash in threats during opponents' turns
• Pair Eldrazi Displacer with Forsaken Monument for infinite colorless mana
• Sacrifice Eldrazi Spawn/Scions to Eldrazi Monument for indestructible board

Weaknesses:

Critical

• Commander-dependent strategy: Losing Ulalek repeatedly cripples copy synergy
• Severe vulnerability to Drannith Magistrate/Cursed Totem shutting off key mechanics
• Minimal instant-speed interaction for resolved threats

Moderate

• High reliance on artifact ramp makes it weak to mass artifact removal
• Limited card draw outside combat (relies on Kozilek's Unsealing/Endbringer)
• Struggles against fast combo decks due to slow setup

Minor

• Color fixing can be inconsistent despite numerous duals
• Annihilator triggers draw heavy political aggro

Most Important Cards:

• Ulalek, Fused Atrocity (Copy engine for exponential value)
• All Is Dust (Asymmetric board reset enabling Eldrazi dominance)
• Forsaken Monument (Mana amplification + lifegain + anthem)
• Eye of Ugin (Tutor + cost reduction)
• Planar Bridge (Tutor any permanent)
• Eldrazi Monument (Makes board unstoppable)
• Conduit of Ruin (Tutor + cost reduction)
• Ulamog, the Ceaseless Hunger (Game-ending exile engine)
• The Great Henge (Card advantage + counters)
• Lithoform Engine (Triples Ulalek's copy effects)

Attribute Ratings:

Speed: 6/10
Can deploy game-ending threats by T7-8 through ramp, but requires setup turns for Ulalek synergy.

Resilience: 5/10
Limited protection beyond Not of This World, though recursive threats like Ulamog, the Infinite Gyre provide some recovery.

Consistency: 7/10
Strong land/artifact ramp package and multiple Eldrazi tutors ensure regular access to threats.

Interaction: 5/10
Spot removal (Beast Within, Swords) and counterspells (Warping Wail) exist but lack density for multi-player tables.

Rating Justification:

The deck demonstrates focused ramp and synergy for T7-8 wins through massive Eldrazi threats and copied triggers, but its commander dependency and vulnerability to stax/removal prevent higher optimization. Matches the "Focused" tier (T7-8 wins) with room for optimization.

Power level: 6.0 - 6.5