Overview:

This Toxrill, the Corrosive deck focuses on attrition-based control, leveraging the commander's slime counters to gradually weaken opponents' boards while generating Slug tokens. Secondary strategies include life-drain synergies, stax elements (Contamination, Opposition), and reanimation value. Toxrill is essential as the primary engine but requires significant setup and protection due to its 7 CMC. Hidden commanders like Gisa, Glorious Resurrector and Yawgmoth, Thran Physician provide redundancy for creature recursion and sacrifice synergies.

Primer:

Core Strategy Execution:

1. Early Setup (Turns 1-4): Prioritize ramp (Sol Ring, Arcane Signet, Fellwar Stone) and disruption (Mystic Remora, Counterbalance). Use targeted removal (Pongify, Cut Down) or board modifiers (Frogify, Mass Diminish) to stall opponents.
2. Deploy Toxrill (Turns 5-7): Protect Toxrill with Lightning Greaves or counterspells (Counterspell, Negate). Activate its -1/-1 engine to generate Slug tokens and suppress threats.
3. Mid-Game Control: Sacrifice Slugs to Toxrill for card draw. Amplify death triggers with Blood Artist, Mirkwood Bats, and Archfiend of the Dross. Lock opponents with Contamination (paired with recurring tokens) or Opposition to tap key permanents.
4. Win Conditions:
   • Grind opponents via incremental life loss from death triggers.
   • Overwhelm with reanimated threats (Sheoldred // The True Scriptures final chapter, Gisa, Glorious Resurrector).
   • Stax locks (Contamination + token generation, Opposition board paralysis).

Mulligan Priorities:

• Keep hands with 3+ lands (including UB sources) and 1-2 ramp pieces.
• Prioritize early interaction (Skullclamp, Deep-Cavern Bat) or protection (Lightning Greaves).
• Avoid hands lacking ramp or with only high-CMC spells.

Key Tips:

• Use Yawgmoth, Thran Physician to convert Slugs into card draw and proliferate slime counters.
• Reassembling Skeleton combos with Contamination for consistent mana denial.
• Opposition can lock opponents by tapping lands during their upkeep using Slug tokens.
• Sheoldred // The True Scriptures provides a late-game reanimation bomb if flipped.

Weaknesses:

Critical

• Commander Dependency: Removing Toxrill repeatedly cripples the deck’s engine.
• Enchantment Vulnerability: Contamination/Opposition are irreplaceable stax pieces; their removal dismantles key locks.
• Slow Setup: Struggles against fast combo decks due to high average CMC.

Moderate

• Graveyard Reliance: Gisa, Glorious Resurrector and reanimation spells are disrupted by common graveyard hate.
• Mana Constraints: Low land count (35) and color-intensive spells (e.g., Counterbalance) risk stumbling.

Minor

• Limited Flyer Answers: Relies on Sludge Monster or Mass Diminish to handle evasive threats.
• Token Overextension: Board wipes erase Slug token value, though Mystic Remora helps refuel.

Most Important Cards:

• Toxrill, the Corrosive (Primary engine for control and token generation)
• Contamination (Mana denial lock with token sacrifice)
• Opposition (Board control via Slug token tapping)
• Yawgmoth, Thran Physician (Sacrifice outlet, proliferate, and card draw)
• Gisa, Glorious Resurrector (Recursive threat generation)
• Sheoldred // The True Scriptures (Late-game reanimation bomb)
• Blood Artist (Life-drain synergy)
• Mystic Remora (Early-game card advantage)
• Reanimate (Key recursion for Toxrill or combo pieces)
• Lightning Greaves (Critical protection for Toxrill)

Attribute Ratings:

Speed: 5/10

• Wins typically around T8-10 via attrition or stax locks. Fast mana (Dark Ritual) enables early Toxrill, but setup is slow.

Resilience: 6/10

• Moderate protection (counterspells, greaves) and recursion (Reanimate, Lively Dirge), but folds to repeated commander removal.

Consistency: 6/10

• Limited tutors (Diabolic Intent, Siphon Insight) and draw engines (Skullclamp, Morbid Opportunist) make key pieces situational.

Interaction: 7/10

• Strong mix of counterspells, removal, and stax, but lacks answers to resolved enchantments/artifacts outside Force of Vigor-like effects.

Rating Justification:

This deck operates as a slow but potent control list with stax elements, aiming to lock opponents by T8-10 via attrition or Contamination. While resilient to single threats, its reliance on Toxrill and vulnerability to fast combos anchor it in the Casual/Optimized Casual range.

Power level: 4.5 - 5.0