Commander Zavala

Overshield (This creature comes into play with a
+0/+X overshield counter on it where X is this
creature's toughness. When this creature takes
damage for the first time, remove the overshield
counter instead of taking the damage.)
Whenever a Guardian card you control takes
combat damage, you may tap Commander
Zavala. If you do, return target Guardian card
you control to your hand that took combat
damage this turn.