Aput, Shaper of Ice

{s}{s}{s}{s}{s}: Create a legendary 3/3 green and
blue Elemental snow creature token named
Ukiuk. You get an experience counter.
Creature tokens you control named Ukiuk get
+X/+X, where X is the number of experience
counters you have. If X is 3 or more, they also
get reach. If 6 or more, they also get trample.
If 9 or more they also get vigilance. If 12 or
more they also get indestructible.