Overview:

This Rin and Seri deck leverages high-powered mana acceleration and tribal synergies to rapidly generate Cat/Dog tokens and deploy overwhelming board states. The commander serves as both a token engine and direct damage/life gain finisher, enabling wins through combat overruns (amplified by lords like Jetmir, Nexus of Revels and King of the Pride) or an Aetherflux Reservoir combo. Key Cats like Arahbo, Roar of the World and Nazahn, Revered Bladesmith act as potent "hidden commanders," while explosive mana rocks (Gaea's Cradle, Mox Diamond, Grim Monolith) enable early game dominance.

Primer:

Core Strategy Execution:

1. Explosive Start (Turns 1-3): Prioritize deploying fast mana (Mox Diamond, Chrome Mox, Sol Ring, Lotus Petal, Grim Monolith) and land tutors (Nature's Lore, Utopia Sprawl). Use fetches/Prismatic Vista to fix colors. Cast low-cost Cats/Dogs (Selfless Savior, Pack Leader, Ajani's Pridemate) to build early board presence.
2. Token Generation & Value (Turns 3-5): Cast Rin and Seri or key token engines (Leonin Warleader, Brimaz, King of Oreskos, Regal Caracal). Leverage tribal synergies: Cast Cat spells to make Dogs, Dog spells to make Cats. Use Skullclamp on 1/1 tokens for massive card draw. Deploy value engines like Sylvan Library or Felidar Retreat.
3. Win Condition Execution (Turns 4-7):
   • Combat Overrun: Deploy lords (Jetmir, Nexus of Revels, King of the Pride, Feline Sovereign) and pump effects (Jazal Goldmane, Claws Out). Attack with a wide board to trigger Jetmir's triple ability (vigilance/trample/double strike at 3/6/9 creatures) for lethal damage.
   • Commander Burn: Activate Rin and Seri's ability ({R}{G}{W}, Tap) dealing damage equal to Dogs gained and gaining life equal to Cats controlled, often lethal with a wide board.
   • Aetherflux Combo: Generate massive life gain via token ETBs (Ajani's Welcome, Oreskos Sun Guide, Rin and Seri activations) or Felidar Retreat landfall, then use Aetherflux Reservoir to kill opponents.

Mulligan Priorities:

• Keep hands with 2-3 lands (including color fixing) AND at least one fast mana source (e.g., Sol Ring, Mox Diamond, Lotus Petal).
• Prioritize hands containing a turn 1-2 play: Low-cost creature (Selfless Savior, Pack Leader), ramp (Utopia Sprawl, Nature's Lore), or fast mana.
• Strong hands include an early token generator (Leonin Warleader, Brimaz) or key tutor (Worldly Tutor, Enlightened Tutor for Skullclamp/Aetherflux Reservoir).
• Avoid hands lacking early plays or color sources for Rin and Seri's cost ({R}{G}{W}).

Key Tips:

• Maximize Token Synergy: Prioritize casting Cats/Dogs after Rin and Seri is on board to double token generation. Use Skullclamp on 1/1 tokens for immense card advantage. Aura Shards provides constant artifact/enchantment removal.
• Protect Critical Mass: Use Heroic Intervention, Selfless Savior, and Grand Abolisher to protect your board during crucial turns before deploying Jetmir or activating Rin and Seri. Emergence Zone enables surprise wins.
• Tutor Efficiently: Worldly Tutor/Green Sun's Zenith find key Cats (Jetmir, Nazahn, Regal Caracal). Enlightened Tutor fetches Skullclamp, Aetherflux Reservoir, or Sensei's Divining Top. Urza's Saga tutors for Skullclamp or Mox Amber.
• Leverage Mana Advantage: Gaea's Cradle and Nykthos, Shrine to Nyx (with high devotion Cats) generate explosive mana. Use this to deploy multiple threats/turn or activate Rin and Seri multiple times.
• Alternate Lines: Arahbo, Roar of the World provides significant combat buffs from the command zone or battlefield. Nacatl War-Pride creates massive attacking forces against single opponents. Kutzil, Malamet Exemplar locks opponents out of your turn and draws cards.

Weaknesses:

Critical

• Extreme vulnerability to board wipes: Relies heavily on creature presence for tokens, mana (Gaea's Cradle), and win conditions. Recovery is slow without specific draw engines active.
• Severely hampered by Torpor Orb/Hushbringer: Shuts down ETB token generation from Rin and Seri, Leonin Warleader, Regal Caracal, Spirited Companion, and Felidar Retreat, crippling the core strategy.
• Cursed Totem/Linvala, Keeper of Silence: Disables Rin and Seri's activated ability, Skullclamp equipping, and utility from mana dorks like Karametra's Acolyte (not in list but illustrative).

Moderate

• Targeted removal on key lords (Jetmir, King of the Pride) or engines (Rin and Seri, Skullclamp) significantly slows the deck's momentum.
• Graveyard hate disrupts recursion from cards like Eternal Witness (not present, but common in green) and limits Green Sun's Zenith flexibility.
• Rule of Law/Deafening Silence effects hinder the deck's ability to cast multiple creatures/turn and exploit token synergies.

Minor

• Can struggle against flying-heavy decks without sufficient reach or deathtouch, though Rin and Seri's ability provides some direct damage.
• Life gain strategies can outpace Aetherflux Reservoir kills if not assembled quickly enough.

Most Important Cards:

• Jetmir, Nexus of Revels (Primary combat finisher - enables 1-2 turn kills)
• Gaea's Cradle (Explosive mana generation enabling early commander casts and combos)
• Skullclamp (Primary card draw engine - converts tokens into cards)
• Aetherflux Reservoir (Alternative combo win condition)
• Rin and Seri, Inseparable (Token engine and direct win condition)
• Arahbo, Roar of the World (Powerful combat buff from command zone)
• Mox Diamond (Critical fast mana for explosive starts)
• Worldly Tutor (Finds key Cats like Jetmir or Regal Caracal)
• Urza's Saga (Tutors Skullclamp or Mox Amber, creates tokens)
• Heroic Intervention (Essential protection for board-centric strategy)

Attribute Ratings:

Speed: 8/10

• Explosive fast mana enables T3 Rin and Seri or T4 Jetmir/Aetherflux wins. Consistent T5-7 win threats through combat or combo in unimpeded scenarios.

Resilience: 5/10

• Includes key protection (Heroic Intervention, Grand Abolisher) and card draw (Skullclamp, Sylvan Library), but heavily reliant on board state. Struggles to rebuild after wipes without specific engines online.

Consistency: 8/10

• Excellent mana base/fixing, potent tutors (Worldly, Enlightened, Green Sun's Zenith), and strong card selection (Sylvan Library, Sensei's Top) ensure reliable access to key pieces.

Interaction: 4/10

• Efficient targeted removal (Swords to Plowshares, Boseiju) and artifact/enchantment hate (Aura Shards), but lacks countermagic and has minimal stack interaction beyond Grand Abolisher. Relies on speed over disruption.

Rating Justification:

This deck achieves high power through exceptional speed (T4-T5 win potential) and consistency, leveraging cEDH-level mana acceleration and tutors to execute combat or Aetherflux wins rapidly. However, its reliance on a vulnerable board state and lack of stack interaction prevents it from consistently competing at the highest tiers, placing it in the optimized high-power range.

Power level: 6.5 - 7.0