Overview:

This Isshin, Two Heavens as One deck focuses on doubling attack-trigger value while maintaining combo potential. It leverages both token swarm strategies (via Myrel, Shield of Argive, Hero of Bladehold) and infinite combat combos (Aggravated Assault + Sword of Feast and Famine). The deck shows strong redundancy in attack triggers but relies heavily on the commander for maximum efficiency.

Primer:

Core Strategy: This deck aims to flood the board with attack-trigger value engines, using Isshin to double their output. Key lines include:

1. Token Overload: Winota, Joiner of Forces and Adeline, Resplendent Cathar generate overwhelming boards that scale exponentially with Isshin's doubling.
2. Infinite Combats: Aggravated Assault + Sword of Feast and Famine creates infinite combat phases. Combat Celebrant provides redundancy.
3. Kiki-Jiki Lines: Kiki-Jiki, Mirror Breaker + Felidar Guardian creates infinite hasty 1/4s. Restoration Angel effects are missing, making this less consistent.

Mulligan Priorities:

• Keep hands with Isshin enablers (Lightning Greaves, Swiftfoot Boots)
• Prioritize 3 lands with at least two colors
• Value early attackers (Esper Sentinel, Thalia, Guardian of Thraben) over slow value

Key Tips:

• Time Isshin casts after establishing 1-2 attackers to dodge removal
• Use Sunforger to fetch protection (Boros Charm, Silence) before comboing
• Strionic Resonator doubles Isshin's doubling effect for quadruple triggers

Avoid Traps:

• Don't overextend into board wipes without Flawless Maneuver
• Save tutors for combo protection rather than value pieces

Weaknesses:

Critical:

• Heavy commander dependency (70% of cards lose >50% value without Isshin)
• Minimal graveyard recursion for combo pieces

Moderate:

• Vulnerable to stax effects (Rule of Law, Cursed Totem)
• Limited card advantage engines

Minor:

• Weak to mass exile effects (Farewell, Merciless Eviction)

Most Important Cards:

• Kiki-Jiki, Mirror Breaker
• Felidar Guardian
• Aggravated Assault
• Sword of Feast and Famine
• Winota, Joiner of Forces
• Demonic Tutor
• Enlightened Tutor
• Grand Abolisher
• Strionic Resonator
• Sunforger

Attribute Ratings:

Speed: 7/10
Theoretical T4 win (T1 ramp → T2 Isshin → T3 Sword → T4 Aggravated Assault). Average goldfish win ~T6-7.

Resilience: 5/10
Relies on commander for maximum output (dies to 3+ removals). Limited protection beyond Flawless Maneuver/Boros Charm.

Consistency: 6/10
8 tutors (including Sunforger package) but lacks redundancy for key combo pieces like Sword of Feast and Famine.

Interaction: 6/10
A-Tier spot removal (Swords to Plowshares, Anguished Unmaking) but minimal counterspells. Grand Abolisher provides critical combo protection.

Rating Justification:

This deck sits between "Optimized" (rubric 6.5) and "Focused Competitive" (7.0):

• Faster than T8-10 casual decks via combo lines
• Lacks free interaction/protection seen in 7.5+ lists
• More fragile than cEDH-adjacent builds but more explosive than precon-level strategies

Power level: 6.0-6.5