Morkrut Banshee

Oracle Text

Morbid — When Morkrut Banshee enters the battlefield, if a creature died this turn, target creature gets -4/-4 until end of turn.

Card Rulings

9/22/2011 The morbid ability is mandatory. If there are no other creatures on the battlefield when the ability triggers (and a creature died this turn), the ability must target Morkrut Banshee itself.