Overview:

This five-color Eldrazi tribal deck helmed by Ulalek, Fused Atrocity focuses on explosive ramp into massive colorless threats, amplified by the commander's spell/ability copying ability. The strategy leverages high-impact Eldrazi with annihilator, recursion engines like Spawnbed Protector, and cost reducers like Urza's Incubator to deploy game-ending threats. Ulalek serves as both a value multiplier (doubling ETB triggers like Oblivion Sower's land theft) and a combo enabler with triggered abilities like Kozilek's Unsealing token generation. The deck can win via overwhelming board presence, resource denial (annihilator), or value engines like Sire of Stagnation, but requires careful mana management due to its five-color commander cost.

Primer:

Core Strategy Execution:

1. Early Setup (T1-4): Prioritize ramp artifacts (Mana Vault, Grim Monolith) and color-fixing lands (Cavern of Souls, Unclaimed Territory). Use Ancient Stirrings/Up the Beanstalk to find key pieces.
2. Midgame Acceleration (T4-6): Deploy cost reducers (Herald's Horn, Forsaken Monument) and flash enablers (Liberator, Urza's Battlethopter). Cast mid-sized Eldrazi like Thought-Knot Seer to trigger Ulalek's copy effect.
3. Endgame Domination (T6+): Resolve game-warping spells like All Is Dust or Ugin, the Spirit Dragon, followed by recursive threats (Artisan of Kozilek). Use Emergence Zone to flash in Void Winnower during opponents' turns.

Mulligan Priorities:

• Keep hands with 2+ ramp sources (artifact or land-based)
• Prioritize color-fixing (minimum 3 color sources for Ulalek's WUBRG activation)
• Reject hands without early mana development or excessive high-CMC clumps

Key Tips:

• Sequence Ulalek after establishing 2+ mana rocks to enable immediate {C}{C} payments for copying
• Use Darksteel Monolith's free cast ability with Liberator, Urza's Battlethopter for surprise threats
• Pair Skullclamp with Eldrazi Spawn tokens from From Beyond for explosive card draw
• Selective Obliteration becomes a one-sided board wipe when timed with All Is Dust

Weaknesses:

Critical

• Severe vulnerability to Cursed Totem/Linvala, Keeper of Silence shutting down mana dorks and activated abilities
• Commander-dependent strategy struggles with repeated removal (Ulalek's 5-color cost makes recasting prohibitive)

Moderate

• Blood Moon/Back to Basics cripples the color-fixing land base
• Limited stack interaction beyond Warping Wail and Kozilek, the Great Distortion

Minor

• High-CMC threats make recovery from board wipes slow
• Drannith Magistrate blocks crucial cast triggers

Most Important Cards:

• Ulalek, Fused Atrocity (Strategy linchpin - doubles all triggers)
• Forsaken Monument (Mana amplification + life gain)
• Urza's Incubator (Critical cost reduction)
• Liberator, Urza's Battlethopter (Flash enabler for surprise copies)
• Kozilek's Unsealing (Token generation + card draw engine)
• All Is Dust (One-sided board reset)
• Darksteel Monolith (Free spell casting)
• Spawnbed Protector (Recursion + token generation)
• The One Ring (Card draw + protection)
• Eye of Ugin (Tutor for Eldrazi finishers)

Attribute Ratings:

Speed: 7/10
Capable of T4-5 explosive starts with perfect draws (Mana Vault → Grim Monolith → Ulalek + trigger payment), but typically threatens wins T7-9 through annihilator pressure.

Resilience: 5/10
Multiple recursion engines (Volrath's Stronghold, Spawnbed Protector) but over-reliance on commander and vulnerable mana rocks.

Consistency: 6/10
Strong colorless tutors (Eye of Ugin, Sanctum of Ugin) offset by five-color mana requirements and high average CMC.

Interaction: 4/10
Limited removal beyond Ugin's Binding and Eldrazi ETBs. Relies on Warping Wail for stack interaction.

Rating Justification:

This deck demonstrates focused ramp into high-impact threats with T7-9 win potential through annihilator and value engines, but its commander dependency and vulnerability to common stax pieces limit its ceiling. The combination of explosive starts and fragile late-game recovery aligns with optimized casual tiers.

Power level: 6.0 - 6.5