The Swarmlord

The commander-recast tax turned upside down. Most decks treat the escalating cost of recasting your general from the command zone as a penalty to be minimized; Rapid Regeneration makes it the whole point, adding two +1/+1 counters to the printed 5/5 for each time you've cast your commander from the command zone this game. That inverts the usual arithmetic: you want this creature to have died repeatedly, because each trip through the command zone leaves it larger the next time. The counters live on the body, not on a static effect, which is what threads it into Xenos Cunning: any counter-bearing creature you control dying replaces itself with a card, so the same recursion loop that grows the Swarmlord also feeds you off every trade, sacrifice, and board wipe. Built for a counters-matter Temur shell, it wants a battlefield where creatures carry markers by default, and it rewards a deck willing to let its threats die on purpose. The result is a commander that reads the game's built-in disincentive against replaying your general as fuel, paired with a draw output that punishes opponents for interacting the ordinary way: removal that kills it just cues the next, bigger recast, and a wrath that clears your side just refills your hand.