Overview:

Miirym, Sentinel Wyrm leads a Dragon tribal deck focused on explosive value generation through token duplication. The strategy leverages high-impact Dragons like Terror of the Peaks and Scourge of Valkas to convert creature ETBs into direct damage, while cost reducers and efficient ramp accelerate the deployment of threats. Though lacking infinite combos, the deck achieves overwhelming board states through redundancy and synergy, typically closing games via combat or stacked damage triggers.

Primer:

Core Strategy:
Deploy Miirym by turns 4–5 using mana dorks (Birds of Paradise), land-fetch spells (Three Visits), and cost reducers (Urza's Incubator). Once active, every Dragon cast creates a token copy via Miirym, doubling ETB damage (Terror of the Peaks), draw triggers (Temur Ascendancy), and mana generation (Goldspan Dragon). Key wincons include:

• Combat Overload: Atarka, World Render grants double strike to flying Dragons, while Thrakkus the Butcher doubles their power.
• Damage Triggers: Scourge of Valkas and Dragon Tempest stack lethal damage as the Dragon count grows.
• Treasure Synergy: Old Gnawbone and Ancient Copper Dragon fuel explosive turns with mana for game-ending spells like Finale of Devastation.

Mulligan Priorities:

• 3 lands (prioritize untapped sources like Misty Rainforest).
• 1–2 ramp pieces (e.g., Sol Ring, Dragonlord's Servant).
• At least 1 Dragon or card advantage engine (Elemental Bond, Kindred Discovery).

Key Tips:

• Sequence Reducers First: Play Herald's Horn or Dragonspeaker Shaman before casting Miirym to enable earlier threats.
• Protect Miirym: Use Lightning Greaves or free counterspells (Fierce Guardianship) to safeguard your engine.
• Exploit Token Synergy: Roaming Throne (naming Dragon) doubles all Dragon triggers, quadrupling damage with Miirym copies.

Avoid Traps:

• Overextending into board wipes without Deflecting Swat or Swan Song backup.
• Holding Dragons when Miirym isn’t secure—cast key threats even without duplication if necessary.

Weaknesses:

Critical:

• Commander Reliance: 3+ removals on Miirym cripples token generation.
• Board Wipe Vulnerability: Limited mass recursion; relies on rebuilding via Kindred Summons or Monster Manual.

Moderate:

• Stax Weakness: Blood Moon disrupts mana base; Rule of Law slows Dragon spam.
• Graveyard Hate: Exiling Dragons nullifies Monster Manual’s Adventure mode.

Minor:

• Life total pressure from pain lands (Shivan Reef) and aggressive mulligans.

Most Important Cards:

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Attribute Ratings:

Speed: 7/10

• Turn 5–7 wins via combat/damage triggers with optimal draws. Cost reducers enable T4 Miirym into T5 Dragon spam.

Resilience: 6/10

• Free counterspells (Fierce Guardianship, Deflecting Swat) and haste enablers mitigate removal. Struggles against repeated wipes or stax.

Consistency: 7/10

• 8+ card-draw engines (Elemental Bond, Rhystic Study) and 5+ Dragon tutors (Kindred Summons, Defense of the Heart).

Interaction: 6/10

• S-tier counterspells and targeted removal (Beast Within, Cyclonic Rift), but lacks graveyard/artifact hate.

Rating Justification:

This deck operates at the high end of optimized casual (5.5–6.0), capable of T8–10 wins through combat or damage synergies. It lacks the fast mana and infinite combos of cEDH but outpaces precons with redundancy and focused synergies. The reliance on Miirym and vulnerability to stax anchor it below tuned competitive tiers.

Power level: 5.5 - 6.0