Teleios, Knight Of Perfection

Whenever a Knight enters the battlefield under
your control create a 2/2 white Horse Mount
creature token with "Saddle 2. Whenever this
creature attacks while saddled, it gains +X/+X
and trample where X is the Knight's power who
saddled it."
At the end of combat, exile up to one target
Knight that saddled a mount this turn, then return
it to the battlefield under your control.