Kirby, Ability Copier

When Kirby blocks or is blocked, exile the
creature it's blocking or the creature blocking it.
Kirby has all keyword abilities of card exiled with
it. When Kirby leaves the battlefield, return all
cards exiled with it to their owners' hands.
It has +1/+1 for each keyword ability it has.
Kirby can attack as though it didn't have
defender if it has toughness 5 or greater.
Flying, Indestructible, Defender