Minecraft Pig

Mate {1}{w}
If this creature is the target of a Lightning spell, it gains indestructible until end of turn and becomes a 3/3 red and black Zombie Pigman with "When this or another creature of the same name is dealt damage, put a +1+1 counter on this creature. It must survive the damage to get the counter."
You may have any number of this creature in your library.