Blunderbores come in three other variants: Gorebelly, Mauler and Urdar. These monsters have a 15% chance of Crushing Blow in Nightmare and a 25% chance of Crushing Blow in Hell. On Hell Difficulty, Blunderbores are immune to Fire, Gorebellies to Cold, and Maulers to Lightning. Urdars do not possess any immunities. There are Super Unique Blunderbores.