When Krillin is forced to discard from his life deck, he may take that first card into his hand. If used by Krillin, this card stays on the table to be used one more time in this combat.
I've seen enough of that bonehead barbarian's torture.
Errata:
Treat this card as if it read “Play this card as a defense. If your opponent’s attack does life cards of damage to you, you may take the first life card of damage from that attack and place it in your hand instead of discarding it. If used by Krillin, this card stays in play to be used on more time this Combat.”