Overview:

A mono-blue polymorph strategy that aims to cheat out Kozilek, Butcher of Truth while controlling the game through countermagic and extra turns, supported by a robust artifact-token subtheme for sacrifice fodder.

Primer:

The deck operates by generating small artifact creatures through various token producers like Sai, Master Thopterist, Genesis Chamber, and Nuisance Engine, which serve as sacrifice fodder for Jalira's ability. The key payoff is Kozilek, Butcher of Truth, the only non-legendary creature in the deck, ensuring it's always the hit off Jalira's ability. This creates a deterministic polymorph strategy that can be executed as early as turn 4-5 with fast mana.

The deck is heavily protected by countermagic and includes multiple tutors to find key pieces. It can win through combat damage with Kozilek or by chaining extra turns with cards like Time Stretch and Expropriate. The artifact subtheme provides additional value through cards like Urza's Saga and Mechanized Production, offering alternative win conditions and ensuring consistent access to sacrifice fodder.

Weaknesses:

The deck is vulnerable to graveyard hate that can exile Kozilek, and artifact removal can severely hamper the token generation plan. It's also relatively dependent on the commander, though the extra turns package provides a backup plan. The deck can struggle against multiple opponents due to its single-target nature and limited board presence before establishing its gameplan.

Most Important Cards:

1. Kozilek, Butcher of Truth
2. Mana Vault
3. Rhystic Study
4. Expropriate
5. Force of Negation
6. Fierce Guardianship
7. Sai, Master Thopterist
8. Genesis Chamber
9. Mystical Tutor
10. Ancient Tomb

Attribute Ratings:

• Speed: 7/10
• Resilience: 8/10
• Consistency: 8/10
• Interaction: 9/10

Rating Justification:

This deck operates at a high-powered level but falls short of true cEDH territory. It can consistently threaten wins or establish strong board control by turns 4-5, protected by premium interaction. While it lacks the explosive speed of top-tier decks, its consistent gameplan and strong protection suite place it firmly in the high-power category. The inclusion of multiple tutors, fast mana, and free counterspells supports this assessment.

Final power level rating: 8.0 - 8.5

This rating reflects the deck's ability to consistently execute its gameplan with protection, while acknowledging that it doesn't quite reach the speed and efficiency of top-tier cEDH decks. The deck's strong interaction suite and ability to recover from disruption through multiple win conditions contribute to its high power level.