Darth Vader, Lord of Darkness

Menace Trample
Whenever this creature deals combat damage
to a player, the Force tempts this creature (pay
2 life, place a -1/-1 counter on target, place a Darkside counter on this creature) creature for each damage
dealt by this creature.

At the beginning of your end step, distribute X
damage to up to X different targets, where X is the
number of Darkside counters on Darth Vader