Kasumi, Sister of Ninjas

Skulk, ninjutsu {u}{b} ({u}{b}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Kasumi deals damage to an opponent, change the name of any number of creatures to Kasumi, Sister of Ninjas.
Whenever a spell or ability would target Kasumi, target another random creature with the same
name instead