Overview:

This is a highly optimized storm/combo deck utilizing Krark, the Thumbless and Silas Renn, Seeker Adept to generate massive spell value through coin flips, ultimately winning through storm count or Thassa's Oracle consultation combos.

Primer:

The deck operates as a turbo-storm deck, leveraging Krark, the Thumbless's ability to potentially double spells and create spell loops. The deck runs a full suite of fast mana and efficient interaction to protect its gameplan while setting up. Primary lines include building storm count through Krark triggers combined with cost reducers like Storm-Kiln Artist, or assembling the Thassa's Oracle/Demonic Consultation combo. Underworld Breach serves as an additional combo piece for storm lines.

The deck's strength lies in its ability to chain multiple spells together while generating mana through rituals and treasures. Cards like Veyran, Voice of Duality and Harmonic Prodigy double Krark triggers, creating exponential value. The deck can often win as early as turn 2-3 through either storm count or consultation, with heavy protection through free counterspells and interaction.

Weaknesses:

• Highly dependent on having Krark in play for primary storm lines
• Vulnerable to Rule of Law effects and Null Rod/Collector Ouphe effects
• Can fizzle if key pieces are exiled or countered early
• Graveyard hate significantly impacts Underworld Breach lines

Most Important Cards:

1. Underworld Breach
2. Lion's Eye Diamond
3. Thassa's Oracle
4. Storm-Kiln Artist
5. Veyran, Voice of Duality
6. Force of Will
7. Dark Ritual
8. Demonic Consultation
9. Krark's Thumb
10. Chrome Mox

Attribute Ratings:

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

Rating Justification:

This deck consistently threatens wins by turn 2-3 with multiple viable paths to victory and heavy protection. The mana base is perfectly optimized with fetch lands and dual lands, while the interaction suite includes the most efficient free spells available. The deck's ability to win through either storm or consultation, backed by premium interaction, places it firmly in high-powered cEDH territory.

Final power level rating: 9.3 - 9.5

This deck exhibits all the hallmarks of a tier 1 cEDH deck, including:

• Multiple compact win conditions
• Extensive fast mana package
• Premium interaction suite
• Highly optimized mana base
• Consistent ability to threaten wins by turn 2-3
• Resilience through protection and redundancy

The rating reflects its position as a highly competitive deck capable of competing at the highest levels of cEDH, while acknowledging that it's slightly below the absolute fastest decks in the format.