Nihilego, UB-01

When Nihilego, UB-01 deals lethal damage to a creature, it gets +1/+1 and a charge counter.
{t} Remove a charge counter from Nihilego:
Target opponent makes a 0/1 colorless Hazard creature token named Stealth Rocks
with indestructible and
"Creatures you control with flying get +0/-2"