Darth Vader

Trample
When Darth Vader enters the battlefield, sacrifice
any number of creatures. Darth Vader gets
+X/+X, where X is the number of creatures sacrificed this way. Whenever a creature enters the battlefield under your control, you may sacrifice it
and increase Darth Vader's power and toughness
by 1 each.
"When I left you I was but the learner. Now I am the master."