Overview:

This Jund (B/R/G) deck helmed by Reyhan, Last of the Abzan and Rograkh, Son of Rohgahh focuses on +1/+1 counter proliferation and Ooze tribal synergy. The strategy leverages Reyhan's counter redistribution ability when creatures die, amplified by counter doublers like Corpsejack Menace and Winding Constrictor. The deck aims to swarm the board with massive Ooze tokens via 25 copies of Slime Against Humanity, supported by recursive threats like Ochre Jelly and Biowaste Blob. Rograkh serves as an early-game enabler for commander tax mitigation and provides a counter carrier for Reyhan's ability.

Primer:

Core Strategy Execution:

1. Early Setup (Turns 1-3): Deploy Rograkh for early pressure/blocking. Use ramp like Sol Ring, Emerald Medallion, and tapped dual lands to accelerate. Cast counter enablers like Winding Constrictor or Scavenging Ooze.
2. Mid-Game Engine (Turns 4-6): Resolve Slime Against Humanity repeatedly to create large trampling Oozes. Use Hydra's Growth, Invigorating Surge, or Biogenic Upgrade to exponentially grow threats. Activate Warstorm Surge to burn opponents as creatures enter.
3. Late-Game Domination (Turns 7+): Leverage Reyhan's counter redistribution to recover from board wipes. Close games via massive Preposterous Proportions swings or Chain Reaction clears followed by rebuilt boards.

Mulligan Priorities:

• Prioritize hands with 2-3 lands (including green/black sources) and at least one ramp spell.
• Keep hands with early counter engines (Winding Constrictor, Scavenging Ooze) or a Slime Against Humanity.
• Avoid hands lacking ramp or with only high-CMC cards like Bontu's Last Reckoning.

Key Tips:

• Sacrifice small Ooze tokens to Moldervine Reclamation for card draw while preserving counters via Reyhan.
• Use Harness the Storm to recast Slime Against Humanity from graveyard for exponential token growth.
• Golgari Charm can regenerate your board during wipes or remove problematic enchantments.

Weaknesses:

Critical

• Extreme vulnerability to board wipes (only 3 mass removal spells, no recursion for noncreatures).
• Lacks counterplay to Rest in Peace/Leyline of the Void, which neuter Reyhan's ability and Slime Against Humanity scaling.

Moderate

• Slow mana base with 15+ tapped lands delays key turns.
• Minimal protection for key pieces (no Heroic Intervention, Teferi's Protection).

Minor

• Limited stack interaction (only 4 targeted removal spells).
• Relies heavily on resolving multiple sorceries for token generation.

Most Important Cards:

• Slime Against Humanity (Primary win condition via token swarm)
• Winding Constrictor (Doubles all counter placement)
• Corpsejack Menace (Quadruples +1/+1 counters with Winding Constrictor)
• Hydra's Growth (Exponential counter scaling)
• Warstorm Surge (Burn finisher for creature ETBs)
• Reyhan, Last of the Abzan (Counter preservation engine)
• Moldervine Reclamation (Card draw from creature deaths)
• Invigorating Surge (Instant-speed counter doubling)
• Scavenging Ooze (Graveyard hate + counter generator)
• Harness the Storm (Recasts Slime Against Humanity from grave)

Attribute Ratings:

Speed: 4/10

• Can create threatening boards by T5-6 but lacks fast mana or combo finishes.

Resilience: 3/10

• Struggles to recover from multiple wipes; limited protection spells.

Consistency: 6/10

• 25 copies of Slime Against Humanity ensure token generation, but lacks tutors for key enablers.

Interaction: 3/10

• Minimal removal suite focused on creatures; no counterspells or artifact/enchantment hate beyond Bedevil.

Rating Justification:

While capable of creating overwhelming boards through counter synergies, the deck's slow mana base, fragility to interaction, and lack of fast win conditions place it in the casual range. Its ability to rebuild via Reyhan and Slime recursion prevents it from being purely jank.

Power level: 3.5 - 4.0