Overview:

Ulalek, Fused Atrocity helms a high-powered Eldrazi tribal deck focused on explosive mana acceleration, casting massive colorless threats, and amplifying their impact through copy effects. The strategy leverages cost reducers like Herald of Kozilek and Urza's Incubator to deploy game-ending Eldrazi like Emrakul, the Aeons Torn and Kozilek, the Great Distortion, while Panharmonicon and Echoes of Eternity multiply their devastating triggers. The deck can generate infinite colorless mana via Basalt Monolith/Forsaken Monument + Clock of Omens to fuel Planar Bridge activations or cast multiple game-warping spells in a single turn.

Primer:

Core Strategy:

1. Mana Supremacy: Deploy fast mana artifacts (Sol Ring, Thran Dynamo) and land-based accelerators (Eldrazi Temple, Urza lands) to reach critical mass for Eldrazi spells.
2. Trigger Amplification: Use Ulalek, Fused Atrocity's copy ability with Reflections of Littjara and Echoes of Eternity to duplicate cast/ETB effects of Eldrazi, creating overwhelming value.
3. Combo Finish: Assemble infinite mana via Basalt Monolith + Forsaken Monument + untap effects (Clock of Omens), then win with All Is Dust + It That Betrays or Emrakul, the Aeons Torn extra turns.

Mulligan Priorities:

• Keep hands with 3+ mana sources including at least 1 accelerator.
• Prioritize early cost reducers (Herald of Kozilek, It That Heralds the End) over high-CMC threats.
• Avoid hands lacking colored sources for commander casting.

Key Tips:

• Time Ghostly Flicker to reset Sire of Stagnation or Spawnbed Protector for repeated value.
• Use The One Ring's protection phase to safely assemble combos.
• All Is Dust clears the board before deploying annihilator threats.

Avoid Traps:

• Don't overextend into board wipes before establishing recursion (Spawnbed Protector, Yggdrasil).
• Prioritize mana stability over early commander casts in removal-heavy metas.

Weaknesses:

Critical:

• Vulnerable to early stax (Blood Moon, Null Rod) disrupting mana base
• No free counterspells to protect combos

Moderate:

• Slow recovery from repeated commander removal
• Limited instant-speed interaction

Minor:

• Painland-heavy mana base risks life total against aggro

Most Important Cards:

• Forsaken Monument
• Panharmonicon
• Echoes of Eternity
• Chromatic Orrery
• Planar Bridge
• All Is Dust
• Emrakul, the Aeons Torn
• Kozilek, the Great Distortion
• The One Ring
• Urza's Incubator

Attribute Ratings:

Speed: 7/10

• Can generate infinite mana by T5-6 via artifact combos
• Deploys 10+ mana threats as early as T4 with optimal ramp

Resilience: 5/10

• Limited protection for combos beyond Eldritch Immunity
• Recursion exists but requires setup (Yggdrasil, Spawnbed Protector)

Consistency: 6/10

• 8+ mana accelerators and 4 cost reducers
• Minimal tutors (Moonsilver Key, Inventors' Fair) offset by strong draw engines (Kozilek's Unsealing, The One Ring)

Interaction: 4/10

• Relies on delayed answers (Ugin's Binding, All Is Dust)
• Only 3 instant-speed interaction pieces

Rating Justification:

This deck exceeds optimized casual (5.5) through explosive mana potential and combo finishes, but lacks the interaction density and speed of focused competitive lists. Comparable to 6.0-6.5 tier:

• Matches "Focused" (T7-8 wins) via infinite mana lines
• Outpaces precon-level decks but folds to early stax
• Less consistent than true cEDH despite high ceiling

Power level: 6.0 - 6.5