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The Holy Hand Grenade is a ranged weapon added by Xeno's Reliquary. The Holy Hand Grenade does high amounts of damage to mobs while keeping blocks intact. It does not affect the user other than a knockback effect. The item functions similar to Glowing Water and any Splash Potion. It can deal up to 100 points of damage to any mob, which is enough to kill all non-boss or Infernal mobs. It can also damage other players in PVP. Even the Wither and Ender Dragon, as well as other powerful bosses, will be severely damaged by it. This, coupled with the (for Hexxit) fairly cheap crafting recipe makes the Holy Hand Grenade a great weapon to bring along on a dungeon raid.
- The Holy Hand Grenade is a reference to "Monty Python and the Holy Grail" in which the main characters use it to defeat the killer bunny.