Kasumi, Aikido Scion

Whenever Kasumi, Aikido Scion deals combat
damage to a player, untap it and you gain 2 life.
Whenever Kasumi, Aikido Scion blocks or is
blocked, until end of turn, its base power
becomes equal to the greatest power among
creatures blocking or blocked by it.
When a creature that was dealt damage this turn
by Kasumi, Aikido Scion dies, put that creature
on top of its owner's library.