The clouds grew thick, and then they grew teeth.

GRN Guild Kit

Thunderheads

Replicate {2}{U} (When you cast this spell, copy it for each time you paid its replicate cost.)
Create a 3/3 blue Weird creature token with defender and flying. Exile it at the beginning of the next end step.

Duel Decks: Izzet vs. Golgari

Replicate {2}{U} (When you cast this spell, copy it for each time you paid its replicate cost.)
Put a 3/3 blue Weird creature token with defender and flying onto the battlefield. Exile it at the beginning of the next end step.

Guildpact

Replicate {2}{U} (When you play this spell, copy it for each time you paid its replicate cost.)
Put a 3/3 blue Weird creature token with defender and flying into play. Remove it from the game at end of turn.

The clouds grew thick, and then the grew teeth.