Overview:

This Tymna/Kraum deck is a high-octane cEDH-compatible storm/combo build leveraging efficient tutors, free interaction, and explosive mana acceleration to execute fast wins through Thassa's Oracle + Demonic Consultation/Tainted Pact or Doomsday piles. The commanders provide consistent card advantage - Tymna rewards combat pressure while Kraum punishes opponents' spellcasting. The deck operates primarily at instant speed with backup plans involving Ad Nauseam and Underworld Breach lines, protected by an extensive suite of free counterspells and stax pieces like Drannith Magistrate.

Primer:

Core Strategy Execution:

1. Early Acceleration (T0-2): Deploy fast mana (Mox Diamond, Lion's Eye Diamond, Mana Vault) and tutors (Demonic Tutor, Vampiric Tutor) to find combo pieces or setup cards like Necropotence.
2. Win Attempt (T1-3):
   • Primary Line: Cast Thassa's Oracle, then exile library with Demonic Consultation/Tainted Pact.
   • Alternate Lines: Resolve Doomsday with protection, assemble Underworld Breach + Lion's Eye Diamond + Brainstorm, or draw 30+ cards via Ad Nauseam.
3. Protection/Disruption: Use free counters (Force of Will, Fierce Guardianship) and stax (Opposition Agent, Grand Abolisher) to protect combos while disrupting opponents.

Mulligan Priorities:

• Keep hands with 1-2 lands + fast mana/tutor.
• Prioritize T1-T2 win potential (e.g., Dark Ritual + Demonic Consultation + Oracle).
• Ensure interaction (at least 1 free counter) if keeping slower hands.

Key Tips:

• Use Silence/Angel's Grace to secure combo turns.
• Lion's Eye Diamond enables Breach lines and fuels Beseech the Mirror.
• Mystic Sanctuary recurs key interaction.
• Opposition Agent steals opponents' tutors for your combo pieces.

Weaknesses:

Critical

• Vulnerable to Opposition Agent disrupting Consult/Pact exiles.
• Drannith Magistrate/Lavinia, Azorius Renegade block Oracle cast triggers.

Moderate

• Graveyard hate (Rest in Peace) disrupts Breach/Doomsday.
• Rule of Law effects slow storm turns.

Minor

• Limited board presence makes Tymna attacks unreliable.

Most Important Cards:

• Thassa's Oracle (Primary win condition)
• Demonic Consultation (Library exile enabler)
• Lion's Eye Diamond (Mana acceleration/breach fuel)
• Force of Will (Free protection)
• Ad Nauseam (Card draw engine)
• Underworld Breach (Recursion engine)
• Doomsday (Alternate win setup)
• Necropotence (Card advantage)
• Opposition Agent (Disruption/tutor theft)
• Mana Vault (Early acceleration)

Attribute Ratings:

Speed: 10/10
Capable of T1 wins with perfect hands (Oracle + Consult + fast mana) and consistent T2-3 goldfish.

Resilience: 9/10
12 free interaction spells, multiple redundant wincons, and stax elements provide exceptional protection.

Consistency: 9/10
16 tutors and 10+ cantrips ensure reliable access to combo pieces.

Interaction: 9/10
17 counterspells/protection spells and 4 hatebears disrupt opponents while safeguarding combos.

Rating Justification:

This deck demonstrates cEDH Tier 1 characteristics with multiple T1-2 win lines protected by free interaction and tutor density. While slightly less deterministic than absolute top-tier lists, its speed and redundancy justify the highest competitive rankings.

Power level: 9.0 - 9.5