Gideon Blacktail

Double Strike
When Gideon Blacktail enters the battlefield, he
fights a creature you choose, and target Demon
you control gains a +1/+1 counter. Whenever
Gideon Blacktail takes damage, he gains +1/+0
until your next untap phase.
{3}: Gideon Blacktail gains +0/+3 until your next
untap phase.
"Oh, well now I'm motivated."