Aurelionite, Titan Goldweaver

Indestructible
Whenever Aurelionite, Titan Goldweaver attacks,
you and defending player each create a colorless
Gold artifact token with "Sacrifice this artifact:
Add one mana of any color."
Sacrifice three Gold tokens: Aurelionite loses indestructible and gains trample until end of
turn. Any player may activate this ability.