Sir Theodric, the Glided Steel

Chivalry 3 (When this creature attacks, you may tap
an untapped creature you control with lesser power. If
you do, this creature gets +3/+3 until end of turn.)
Exile any Demons or Dragons that come into play.
He has vanquished mighty dragons, for his resolve is stronger than their fury. He has vanquished vile
demons, for his faith is stronger than their lies.