Overview:

This Sisay, Weatherlight Captain deck leverages her tutoring ability to assemble a powerful board of legendary permanents, primarily planeswalkers. The strategy revolves around ramping into Sisay early, using her ability to fetch key legendary permanents that accelerate loyalty counters (via proliferate and counter-doubling effects), and winning through overwhelming planeswalker ultimates, combat damage from buffed legendary creatures, or combo locks involving The Chain Veil. Sisay is essential as the engine enabling consistent access to win conditions, and her low cost allows for multiple recasts despite vulnerability to removal.

Primer:

Core Strategy Execution:

1. Early Setup (Turns 1-3): Prioritize ramping with mana rocks (Sol Ring, Arcane Signet, Talismans) or land fetch (Three Visits, Nature's Lore). Cast Sisay by turn 3 using dorks like Birds of Paradise or Bloom Tender.
2. Sisay Activation & Value (Turns 4-6): Use Sisay's ability to fetch low-MV legends that amplify her power (e.g., Esper Sentinel, Voice of Victory), then chain into high-impact planeswalkers like Teferi, Temporal Archmage or Oath of Teferi. Deploy proliferate engines (Evolution Sage, Brokers Ascendancy) to accelerate loyalty counters.
3. Win Condition Execution (Turns 5-7):
   • Planeswalker Ultimates: Secure game-ending emblems (e.g., Nicol Bolas, Dragon-God's -8, Chandra, Awakened Inferno's damage emblems) using proliferate/doublers like Deepglow Skate.
   • Combo: Assemble The Chain Veil + Teferi, Temporal Archmage to untap mana sources and activate planeswalkers infinitely, or use Ichormoon Gauntlet for extra turns.
   • Combat: Overwhelm with buffed legends via Jodah, the Unifier or Avacyn, Angel of Hope-backed indestructible threats.

Mulligan Priorities:

• Keep hands with 2-3 lands, at least one ramp piece (e.g., Sol Ring, Bloom Tender), and Sisay or a tutor (Demonic Tutor).
• Prioritize hands with early interaction (Swords to Plowshares, Swan Song) against aggressive metas.
• Avoid hands lacking colored mana sources or with only high-cost cards.

Key Tips:

• Sisay Sequencing: Fetch permanents that increase her power (e.g., multicolor legends) to unlock higher-MV targets. Prioritize Bloom Tender for WUBRG mana.
• Proliferate Timing: Land drops with Evolution Sage or cast noncreature spells with Ichormoon Gauntlet to double loyalty counters before activating ultimates.
• Protection: Use Teferi's Protection or Galadriel's Dismissal to phase out planeswalkers during board wipes. Plaza of Heroes shields key legends.
• Combo Lines: With The Chain Veil and Teferi, generate infinite mana via Bloom Tender/Chromatic Orrery, then draw your deck with Commodore Guff or exile all nonlands with Ugin, the Ineffable.

Weaknesses:

Critical

• Commander-focused disruption cripples the deck; repeated Sisay removal halts tutoring and slows the game plan drastically.
• Planeswalker-specific hate (e.g., The Elderspell, mass bounce) negates primary win conditions with limited recovery.
• Anti-tutor effects (e.g., Opposition Agent) or stax pieces like Cursed Totem shut down Sisay and mana dorks.

Moderate

• Board wipes reset creature-based ramp and planeswalker protection, delaying key turns despite phasing/recursion.
• Rule of Law effects limit spell density, hindering proliferate triggers and combo assembly.

Minor

• Graveyard hate minimally impacts the deck due to low recursion reliance.
• Land destruction can be mitigated by mana rocks and dorks but may slow early setups.

Most Important Cards:

• Bloom Tender (Mana acceleration for Sisay activations)
• The Chain Veil (Combo enabler for infinite planeswalker activations)
• Teferi, Temporal Archmage (Core combo piece and value engine)
• Deepglow Skate (Doubles loyalty for immediate ultimates)
• Ichormoon Gauntlet (Enables proliferate and extra turns)
• Oath of Teferi (Doubles planeswalker activations)
• Brokers Ascendancy (Passive loyalty/counter growth)
• Demonic Tutor (Finds key combo pieces)
• Smothering Tithe (Mana generation for high-cost spells)
• Rhystic Study (Card advantage engine)

Attribute Ratings:

Speed: 7/10

• Capable of T5-6 wins via Sisay chains into combos (The Chain Veil + Teferi) or accelerated planeswalker ultimates, but slower than dedicated fast-combo decks.

Resilience: 6/10

• Includes protection spells and counterspells, but over-reliance on Sisay and planeswalkers creates vulnerability to targeted removal; recovery is possible but inconsistent.

Consistency: 8/10

• Sisay's repeatable tutoring, backed by 10+ tutors and card draw, ensures reliable access to win conditions and value engines.

Interaction: 7/10

• Runs efficient removal (Swords to Plowshares, Assassin's Trophy), counterspells (Swan Song, Arcane Denial), and board wipes (Cyclonic Rift), but lacks stack interaction for noncreature spells.

Rating Justification:

This deck achieves Focused Competitive speed (T5-6 wins) through Sisay's tutoring and potent planeswalker combos, but its reliance on the commander and vulnerability to disruption limit resilience, placing it below cEDH optimization. The balance of high consistency and solid interaction supports a 7.0-7.5 rating.

Power level: 7.0 - 7.5