Jonathon, Bassmaster

Partner with Xavier, Master Beater
Vigilance, Lifelink, Trample
When Xavier dies, create a black hole that exiles all cards on the field except Jonathon, Jonathon then gains x/x, where x is the amount of turns Xavier was on the field for.
"Ride or die"{5}{b}{b}: Return Xavier to the field, from wherever he may be.