Instant, U (1)
Uncommon
Destroy target creature. It can't be regenerated. That creature's controller puts a 3/3 green Frog Lizard creature token onto the battlefield.
"We've merged your life essence with that of several creatures at once. You're welcome."
—Speaker Trifon
Illus. Jack Wang

1/24/2013: If the creature is an illegal target when Rapid Hybridization tries to resolve, it will be countered and none of its effects will happen. No Frog Lizard token will be created.
1/24/2013: If Rapid Hybridization resolves and the creature isn’t destroyed (perhaps because it’s indestructible), its controller will still get the Frog Lizard token.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern