Petropia

(Transforms from Chromastone.)
{t}: Add {w} for each creature you control.
At the beginning of each end step, if a
creature with toughness 4 or greater died
this turn, create a 3/3 white Alien creature
token with protection from white, then
Bolster 1. (Choose a creature with the least
toughness among creatures you control and put a
+1/+1 counter on it.)