Osvald, Vengeful Scholar

First strike, prowess, trample
Alephan's Wisdom - Each time a stack is finished resolving, you may take the bottommost card
from the stack and place it beneath Osvald,
Vengeful Scholar instead of sending it to its
intended zone. When Osvald, Vengeful
Scholar attacks, he gains +X/+0 for the attack,
where X is the number of cards beneath
Osvald, Vengeful Scholar that you remove and
send to their originally intended zone.