Six Ping

Equipped creature has rehearse and is a Musician in addition to its other types (At the beginning of your upkeep, put a verse counter on equipped creature. If that creature has multiple instances of rehearse, each triggers separately.)
Remove a verse counter from equipped creature: Six Ping deals 1 damage to any target.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)