Indestructible, Legendary Convoke

(Your Legendary creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Final Stone cannot be taken control of.

At the end of your upkeep, put a Final counter on Final Stone for each Legendary Permanent you control.

Remove 5 Final counters: choose one —

• Proliferate

• Add 2 mana of any color

• Put a +1/+1 counter on up to 2 target creatures you control.

• You gain 5 life