Owlbear

Draw an owlbear. Your opponent gives it a name.
They roll a d6 and place it on the drawing.
Each of your Main phases, roll a d6. If you roll
the number on their die, recover the drawing and
deal damage equal to the amount of times you
rolled. If the battle ends before you recover the drawing, they keep it.
Sacrifice: Gain a temporary Owlbear companion
for 24 hours