Moss-Covered Marvel

Binary (Whenever you cast a spell, switch this permanent between on and off. It starts on.)
As long as Moss-Covered Marvel is off, it isn't a creature.
At the beginning of your upkeep, if Moss-Covered Marvel is off, you get {e}{e}.
Pay {e}{e}: Moss-Covered Marvel gets +1/+1 and indestructible until end of turn.