The Crystal Grenade is a Hardmode throwing weapon. On hit, it creates 12 crystal shards much like the Crystal Bullets. This is currently one of two non-telekinetic damage weapons in Esper Class. The purpose for this weapon is to give back a throwing weapon due to the Flying Knife being changed from a throwing (with certain mods) to a telekinetic weapon. It has a 25% (50%) chance of being dropped by a Hallowed Mimic.
Its best modifier is Unreal.