Creature — Frog Horror
4 / 1
As long as there are four or more creature cards in your graveyard, Gray Slaad has menace and deathtouch.
Sorcery — Adventure
Mill four cards. (Then exile this card. You may cast the creature later from exile.)
If an object becomes a copy of an object that has an Adventure, the copy also has an Adventure. If it changes zones, it will either cease to exist (if it’s a token) or cease to be a copy (if it’s a nontoken permanent), and so you won’t be able to cast it as an Adventure.