Rin and Seri, Inseparable
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.
- CMC
- 4
- Mana cost
- Color identity
- GRW
- Rarity
- mythic
- Set
- Core Set 2021
- Price
- $28.25
- EDHREC rank
- #5624
Rin and Seri, Inseparable generates a free Cat and Dog token every time you cast a Cat or Dog spell, then converts those tokens into a lethal damage or life burst on demand — it's a self-fueling engine stapled to a four-mana body. The ceiling rises sharply alongside Earthcraft or Jinnie Fay, Jetmir's Second, both of which turn the token flood into something that ends games.
Best Commanders
Commanders with the highest synergy
Jinnie Fay, Jetmir's Second
Jinnie Fay, Jetmir's Second replaces every token you'd make with a 2/2 Cat or 3/1 Dog with haste, so each Cat or Dog spell cast under Rin and Seri, Inseparable doubles its own trigger into a pair of upgraded, immediately-threatening bodies — the two commanders read as a single engine.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Rin and Seri, Inseparable is a Commander card first and almost exclusively — the four-color identity is trivially accommodated in EDH but awkward or outright prohibitive in 60-card formats where fixing that many colors is a real cost. In Pioneer and Modern, a four-mana legendary that does nothing until you cast another spell is too slow and too conditional against the removal density of those formats. Legacy and Vintage are legal but pointless destinations; nothing about the card's rate justifies competing in those environments. Commander is where it lives, and in that format it's a legitimate build-around with enough tribal payoff density to construct a functional deck around it.
Key Combos
Combo lines featuring this card
Rin and Seri, InseparableEarthcraftWhitemane Lion
Infinite ETB; Infinite LTB; Infinite storm count; Infinite tapped creature tokens
View on Commander Spellbook ↗
Rin and Seri, InseparableEarthcraftTemur SabertoothUniversal Automaton
Infinite ETB; Infinite LTB; Infinite storm count; Infinite tapped creature tokens
View on Commander Spellbook ↗Budget Alternatives
Cheaper options that do most of the same work
No single card replicates what Rin and Seri, Inseparable does — the combination of token generation and direct-damage payoff in one body is unique — but Parallel Lives or Doubling Season can amplify a cheaper token producer to similar board-flood effect. If the goal is a Cat-and-Dog tribal payoff specifically, Raised by Giants or a straight tribal lord trades raw token volume for a simpler, cheaper route to pressure.
Price Context
Current price
$28.25 premium tier
At $28.25, Rin and Seri, Inseparable sits in premium territory for a build-around legendary that sees meaningful play almost exclusively in Commander. The price reflects low reprint frequency and dedicated tribal demand, and it holds reasonably well because the card has no clean functional substitute — but it's a steep entry for a card that requires a full themed deck to reach its ceiling.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.