Creature — Cockatrice 2/4, 3GG (5)
Rare
Flying
Whenever Cockatrice blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.
Illus. Dan Frazier

10/4/2004: The ability destroys the creature at the end of the combat, which is after all first strike and normal damage dealing is done. This means that a creature may have to regenerate twice to survive the combat, once from damage and once again at end of combat.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern