Star Egg

The Star Egg is an item won from Grate Guy after Mario wins "Look the Other Way" 100 times in Grate Guy's Casino during Super Mario RPG: Legend of the Seven Stars. The Star Egg does 100 damage to all enemies on the field by the inexplicable dancing of a Starslap and two Zeostars. A spotlight appears, the star dances a bit, and then a bird flies by; when the birds leave, enemies are dealt damage. If a character is equipped with the Quartz Charm and uses the egg, the damage output is upped to 150.

Trivia

 * The Smash Egg from Mario & Luigi: Partners in Time physically resembles the Star Egg.