Overview:

This Izzet spellslinger deck revolves around Eris, Roar of the Storm, leveraging instant/sorcery recursion and cost reduction to flood the board with 4/4 Dragon tokens while enabling explosive combo finishes. The deck casts cheap cantrips and rituals to fill the graveyard with varied mana-value spells, drastically reducing Eris's cost. Secondary win conditions include infinite mana combos (Dramatic Reversal + Isochron Scepter, Reiterate + rituals) paired with Brain Freeze storm kills or overwhelming Dragon swarms amplified by Veyran, Voice of Duality and Roaming Throne. Eris acts as both a token engine and graveyard enabler, though the deck can function without her via spell-based value engines.

Primer:

Core Strategy Execution:

1. Early Setup (Turns 1-3): Cast cantrips (Brainstorm, Ponder), rituals (Desperate Ritual, Pyretic Ritual), and cost reducers (Goblin Electromancer, Baral, Chief of Compliance). Mill spells (Thought Scour) and Lore Drakkis help stock the graveyard for Eris discounts.
2. Commander Deployment (Turns 3-5): Cast Eris for as little as {U}{R} using graveyard discounts and Jeweled Lotus. Protect her with Lightning Greaves or Deflecting Swat.
3. Token Generation & Combo Assembly: Cast 2+ spells per turn to trigger Eris's Dragon creation. Tutor for Isochron Scepter or Reiterate with Solve the Equation/Fabricate. Use Mystic Sanctuary to recur key spells.
4. Win Conditions:
   • Storm: Brain Freeze with storm count amplified by rituals and Bonus Round.
   • Infinite Mana: Dramatic Reversal imprinted on Isochron Scepter with 2+ mana rocks, or Reiterate + Seething Song (with buyback). Use infinite mana to fuel Brain Freeze or cast Eris repeatedly.
   • Combat: Overwhelm with Dragons boosted by Veyran, Voice of Duality and Roaming Throne (naming Warlock for double Eris triggers).

Mulligan Priorities:

• Keep hands with 2-3 lands, at least one cantrip/ritual, and a cost reducer or tutor.
• Prioritize early graveyard filling (Thought Scour, Consider) if Eris is in hand.
• Avoid hands lacking blue mana or with only high-CMC spells.

Key Tips:

• Use Reiterate to copy rituals for exponential mana or Brain Freeze for mill bursts.
• Helm of the Host on Eris creates exponentially more Dragons each turn.
• Roiling Dragonstorm cycles while digging for combo pieces.
• Goblin Engineer can recur Isochron Scepter or fetch Walking Ballista (if added).

Weaknesses:

Critical

• Graveyard hate (Rest in Peace, Leyline of the Void) cripples Eris's cost reduction and recursion.
• Anti-artifact stax (Collector Ouphe, Stony Silence) shuts down Isochron Scepter and mana rocks.

Moderate

• Commander tax makes Eris increasingly costly if removed repeatedly.
• Board wipes reset Dragon token progress; limited token protection beyond counterspells.

Minor

• Low creature count makes the deck vulnerable to aggressive early pressure.
• Storm lines can fizzle without sufficient card draw or rituals.

Most Important Cards:

• Dramatic Reversal (Infinite mana combo with Isochron Scepter)
• Isochron Scepter (Combo engine/recursion)
• Brain Freeze (Primary storm win condition)
• Reiterate (Ritual copying/infinite mana)
• Eris, Roar of the Storm (Token generation engine)
• Veyran, Voice of Duality (Trigger doubler for Dragons/spells)
• Solve the Equation (Tutors key instants/sorceries)
• Jeweled Lotus (Enables T2-3 Eris casts)
• Baral, Chief of Compliance (Cost reduction + looting)
• Roaming Throne (Doubles Eris's Dragon triggers)

Attribute Ratings:

Speed: 7/10
Capable of T4-5 wins with ideal draws (ritual chains into Eris + storm/combo), but typically threatens wins by T6-7.

Resilience: 5/10
Limited protection for key pieces beyond counterspells; combos are fragile to artifact/graveyard hate.

Consistency: 7/10
Strong cantrip/tutor density ensures access to combo pieces, but lacks redundancy for Eris-specific strategies.

Interaction: 6/10
Robust counterspell suite (Force of Negation, Mana Drain) and targeted removal, but minimal board wipes.

Rating Justification:

This deck operates at a high-power casual level with T5-6 combo potential and strong spell synergy, but its reliance on unprotected combos and vulnerability to common stax pieces prevent cEDH viability. Speed aligns with Focused Competitive (7.0), but resilience shortcomings lower the floor.

Power level: 6.5 - 7.0