Savi'jiiva

Flying, vigalence, trample, uncounterable, and
cannot be coppied or controlled.
Savi'jiiva can only be destroyed by combat
dammedge from creatures and is imune to
deathtouch and infect.
If Savi'jiiva attacked this turn, it gets +20/+20
once permanently, and at the beginning of the
next end step, Savi'jiiva deals damage to all
other creatures equal to Savi'jiivas power. You
cannot loose if Savi'jiiva is in play.
X equals the amount creatures in play.