Rin and Seri, Inseparable
CommanderRin and Seri, Inseparable plays a creature-heavy tribal game that snowballs Cats and Dogs into a wide board, then turns that board into direct damage and life gain.
Public decks: 3Bracket: 1
Card text
Legendary Creature — Dog Cat
Whenever you cast a Dog spell, create a 1/1 green Cat creature token.
Whenever you cast a Cat spell, create a 1/1 white Dog creature token.
, 
: Rin and Seri deals damage to any target equal to the number of Dogs you control. You gain life equal to the number of Cats you control.
Building around this commander?
Use MTG Master to build or analyze a Commander deck around this card, check consistency, and find weak spots before your next game.
Overview
- Leans on casting Cats and Dogs to double up on bodies, quickly going wide without needing dedicated token makers.
- Often plays like Naya creature midrange early, then pivots into a go-wide anthem plan once the board is established.
- The activated ability lets the deck convert a wide board into reach by picking off key creatures or finishing a player, while padding your life total.
- Typically wants a steady curve of tribal creatures plus ramp to keep casting spells and triggering token production.
- Closing games commonly involves mass pump effects and combat pressure, with the commander providing backup damage to any target.
Common lines
- Develop mana, land Rin and Seri, then start chaining Cats/Dogs to build a mixed token board with every cast.
- Build to a critical mass of bodies, then present a big swing backed by an anthem-style payoff (for example, Cathars' Crusade or Beastmaster Ascension).
- Hold up the activated ability as interaction and reach: remove a utility creature, finish a planeswalker, or push the last points at a player.
- Use incidental life gain from the ability to stabilize after racing or to buy time to rebuild after removal.
Strengths
- Efficient board growth: each tribal creature can effectively add two bodies over time.
- Strong combat scaling: wide boards make global pumps and token payoffs very threatening.
- Built-in reach and interaction: the commander can turn board presence into targeted damage.
- Life gain can swing races and help you survive crack-backs from other creature decks.
Weaknesses
- Reliant on board presence; sweepers and repeated wipes can reset your main plan.
- Commander dependency: without Rin and Seri, the deck can feel like fair Naya creatures and may rebuild more slowly.
- Token-heavy boards can struggle into pillowfort effects or frequent fog-style defenses.
- Spot removal on key payoffs (anthem engines) can strand you with lots of small bodies that don’t end the game.
Rule zero notes
- This commander tends to play as a go-wide tribal creature deck; expect a lot of small bodies and combat-focused turns.
- The activated ability can aim at creatures, planeswalkers, or players, so it can function as repeatable reach once the board is built.
- If you’re running big snowball enchantments (for example, Cathars' Crusade), mention it up front since it can sharply increase the deck’s explosiveness and bookkeeping.
- If you include alternate-win or life-total checks (for example, Felidar Sovereign), disclose those lines before the game.
Matchups
Best into
- Creature-heavy midrange pods where combat and board presence matter
- Tables that give time to develop and don’t chain multiple board wipes
- Single-threat decks you can pressure wide and finish with commander damage-to-any-target reach
Struggles against
- Wipe-heavy control pods that repeatedly clear the board
- Fast combo tables where creature combat is too slow to matter
- Decks that punish go-wide strategies or invalidate combat with strong defenses
Recent public decks
Staples
Browse all public decksFAQ
How does Rin and Seri usually win?
Most games end by going wide and amplifying the board with global pumps, then using the commander’s activated ability as reach to close out the last life totals.
Do I need to play only Cats and Dogs?
You generally want a high density of Cats and Dogs to keep the token engine online, but you still need ramp, removal, and a few payoff cards to actually convert bodies into wins.
Is the activated ability mainly removal or a finisher?
It often does both: early it can pick off utility creatures, and later it can point upstairs for a big chunk of damage once your Dogs count is high.
What kind of interaction fits the deck?
Efficient, flexible answers tend to play best so you can keep casting creatures; a card like Chaos Warp is an example of the kind of catch-all removal that doesn’t dilute your engine too much.
How should I play around board wipes?
Avoid overextending into obvious sweepers, and prioritize rebuilding tools and payoffs that let a single post-wipe creature chain re-establish a board quickly.