Crazed Pied-Piper

Rehearse (At the beginning of your upkeep, put a verse counter on this creature.)
At the beginning of your upkeep, create a 1/1 black rat creature token with deathtouch for each verse counter on Crazed Pied-Piper.
Crazed Pied-Piper must attack each turn if able. Otherwise, remove a verse counter.