Gyokko, Upper Moon Five

Flash, Reach, Vigilance, Flanking

Whenever Gyokko, Upper Moon Five or another
Demon you control destroys a creature, put a +1/+1
counter on it.

If Gyokko, Upper Moon Five is destroyed, sacrifice
an artifact you control instead.

{1}{t}: Regenerate Gyokko, Upper Moon Five. Sacrifice target artifact you control.