Frozen Bear

Frozen Bear enters the battlefield with 4 ice
counters on it.
As long as Frozen Bear has ice counters on it, it becomes a 0/4 Creature that cannot attack.
Whenever you cast an instant or sorcery, remove
an ice counter from Frozen Bear. If Frozen Bear
has 0 or less ice counters on it, return all
non-Bear permanents to their owner's hands.