Alehound, the Sneaky Boozer

When Alehound, the Sneaky Boozer enters the battlefield, target opponent reveals their hand.
You may choose an instant or sorcery card from
it and exile that card. Alehound, the Sneaky
Boozer gets +2/+2 for each card exiled this way.
Whenever Alehound deals combat damage to a
player, return all cards exiled with Alehound to
their owner's hand.