Overview:

This Jeskai (U/R/W) deck helmed by Narset, Jeskai Waymaster is a high-octane storm/combo build leveraging fast mana, free interaction, and explosive spell chains. The strategy revolves around casting numerous low-CMC spells per turn to trigger Narset's end-step hand refill, storm payoffs like Brain Freeze, and infinite loops with Underworld Breach/Lion's Eye Diamond. Narset acts as a value engine but isn't strictly essential, as the deck can win through multiple independent combos. Key themes include artifact mana acceleration, spell recursion, and stack control to protect game-ending turns.

Primer:

Core Strategy Execution:

1. Early Setup (Turns 0-2): Deploy fast mana (Mox Diamond, Mana Vault, Lotus Petal) and stax pieces (Grand Abolisher, Drannith Magistrate). Use Rhystic Study/Mystic Remora for card advantage.
2. Combo Assembly (Turns 2-4): Tutor for Underworld Breach (via Enlightened Tutor, Gamble) or Isochron Scepter imprinted with Dramatic Reversal. Generate infinite mana with Scepter+Reversal+3+ mana rocks or Breach+LED+Brain Freeze.
3. Win Conditions:
   • Mill opponents out with stormed Brain Freeze or Grapeshot.
   • Thassa's Oracle/Laboratory Maniac after self-milling via Breach loops.
   • Infinite Grinding Station activations with artifact recursion.
4. Protection: Use free counterspells (Force of Will, Fierce Guardianship) and timing control (Teferi, Time Raveler, Silence) to safeguard combos.

Mulligan Priorities:

• Keep hands with 1-2 lands if they contain fast mana (≥2 accelerants).
• Prioritize hands with tutors, Breach, or Scepter+Reversal synergy.
• Ensure access to blue mana for counterspells.

Key Tips:

• Use Underworld Breach with Lion's Eye Diamond to fuel massive storm turns by exiling spells from your graveyard.
• Displacer Kitten blinks mana rocks for additional activations and dodges removal.
• Jeska's Will provides explosive red mana and card advantage when cast during a storm turn.
• Timetwister and Wheel of Fortune refuel while disrupting opponents' hands.

Weaknesses:

Critical

• Graveyard hate (Rest in Peace, Leyline of the Void) instantly disrupts Breach combos and Lab Man/Oracle lines.
• Rule of Law effects cripple storm turns and Scepter/Reversal loops.
• Heavy artifact removal (Vandalblast, Null Rod) dismantles the mana base.

Moderate

• Drannith Magistrate/Archon of Emeria blocks Narset's casting and limits spell sequencing.
• Early aggression can pressure life total needed for Phyrexian mana spells (Gitaxian Probe, Mental Misstep).

Minor

• Single-target counterspells are less effective against this deck's redundancy and free interaction.
• The One Ring's cumulative life loss becomes relevant in prolonged games.

Most Important Cards:

• Underworld Breach (Recursion engine for infinite loops)
• Lion's Eye Diamond (Mana source for Breach combos)
• Isochron Scepter (Infinite mana with Dramatic Reversal)
• Brain Freeze (Primary storm win condition)
• Force of Will (Free interaction to protect combos)
• Thassa's Oracle (Compact win condition)
• Mana Vault (Critical fast mana)
• Gamble (Tutors key combo pieces)
• Grand Abolisher (Protects combo turns)
• Rhystic Study (Sustains card advantage)

Attribute Ratings:

Speed: 9/10
Capable of T1 wins with perfect draws (e.g., Land → LED + Breach + Brain Freeze + discard outlet) and consistent T3-4 wins through tutors.

Resilience: 7/10
Free counterspells and stax provide protection, but graveyard reliance creates a critical vulnerability.

Consistency: 8/10
14 tutors and massive card draw (Narset, Wheel effects, Study/Remora) ensure frequent combo access.

Interaction: 9/10
11 free/low-CMC counterspells, instant-speed removal (Snap, Borne Upon a Wind), and proactive stax elements.

Rating Justification:

This deck operates at cEDH speeds (T2-3 wins) with robust interaction and tutor density, but its graveyard dependency and vulnerability to specific hate keep it just below top-tier lists. The balance between blistering speed and conditional resilience aligns with high-tier cEDH viability.

Power level: 8.5 - 9.0