Totentanz, Swarm Piper is a uncommon Legendary Creature — Human Warlock Bard card from Wilds of Eldraine (WOE), collector number 216. Current market price: $0.27 (foil $0.29), TCGplayer market prices via Scryfall.
Whenever Totentanz or another nontoken creature you control dies, create a 1/1 black Rat creature token with "This token can't block." {1}{B}: Target attacking Rat you control gains deathtouch until end of turn.