Omniclown Colossus // Pie-roclasm

If an effect copies an Adventure spell, that copy is exiled as it resolves. It ceases to exist as a state-based action; it's not possible to cast the copy as a creature.

If a spell is cast as an Adventure, its controller exiles it instead of putting it into its owner's graveyard as it resolves. For as long as it remains exiled, that player may cast it as a permanent spell. If an Adventure spell leaves the stack in any way other than resolving (Pie-roclasm doesn't require targets, so most likely by being countered), that card won't be exiled and the spell's controller won't be able to cast it as a creature later.

A single Pie-roclasm will destroy all non-Clown creatures with toughness 3 or less. Two will destroy all non-Clown creatures with toughness 6 or less. Three, with toughness 9 or less. Four, with toughness 12 ½ or less. That's a lot of pie.