Unstable Gearhulk JAOS

Trample, Indestructible
If you overload or jump-start a spell, put three
+1/+1 counters on Unstable Gearhulk JAOS.
Remove three +1/+1 counters: add {1}{u}{r}.
Activate this ability only as a Sorcery and only
once per turn.
If Unstable Gearhulk JAOS has 12 or more +1/+1 counters on it, Sacrifice Unstable Gearhulk JAOS, destroy all creatures.