Availability: 1 repop per 4 hours.
You should already be prepared from your fight with the manifestation of evil inaddition though you will need the item:
Item 'the scourge 'Impetus'' is type weapon, alignment 500, made of silver, has keywords 'scourge razor thin quicksilver silver coil impetus', equipped wielded as a weapon. This item weighs 0 stones and 23 pebbles, and is valued at 51,900 gp. This level 241 item has the attributes: identified invis unbreakable The scourge 'Impetus' is in excellent condition. Weapon type is whip, does 165 points of moonlight damage for 1 stamina, accuracy 13. With your knowledge of 'whip', this weapon can cause 211 damage against 0 ar. Special weapon attributes: vorpal *Your proficiency in 'whip' must be greater than 75 to use this item. *Your archon-level must be greater than or equal to 80 to use this item. *This item may be repaired 1 time. The silver glint of Marabah traces itself down Impetus' liquid coil, as the energy inherent in the scourge's frame swirls about, boiling with a righteous fury. From the stainless steel handle to its fluid, tripartite cracker, the scourge is perfectly reflective, almost unnaturally so. The strangest part of Impetus is not its reflectiveness, however, but the fact that the light it reflects is so luminous; it fully dispels the shadows, bringing light to where there is none.
You can aquire this by completing the Mark of Mindfulness, also located in Hellbent Mountain. Take your form all up and wait, anyone with an Impetus will need to unform and reform their own group or go solo, then head east to kill the hidden mob Hargraven's shadow. Only people with the Impetus can damage it, anyone else in form without a whip, or a toy shield, shadow golem, etc will cause it to heal to full every round. Once dead, reform then head all up and west. The up passage will drop you back down at each tic, so best to go quickly after a tic.
Hargraven is pretty straight forward, dispel with timepieces can help, but is not really necessary. He is immune to slow and enervation, but most other spells will land, you can also enervate him out if you plague, poison or famine. He will paralyze the tank and tail lash, as well as cast psionic spells. Once dead head back down, if the final room is closed off then the manifestation of evil will most likely have repoped, and you will need to calm, search and go north.
Note: Final hit person will be awarded the Mark of Enlightenment.
Item 'an amethyst and peridot bracelet' is type amulet, alignment 333, made of stone, has keywords 'amethyst peridot bracelet silver inlaid gemstones', equipped on the wrist. This item weighs 0 stones and 7 pebbles, and is valued at 51,325 gp. This level 241 item has the attributes: identified enforce-level invis insulated magic-resistant no-dispel unique An amethyst and peridot bracelet is in excellent condition. This amulet repels lightning with a success rate of 10%. Affects saving-paralysis by -2. Affects saving-spell by -2. Affects damage by 6. *Your Mark of Shadow must be equal to False to use this item. *This item may be repaired 5 times and renewed 4 times. Amethyst and peridot gemstones the size of your smallest fingernail alternate within the stylish silver band. A small magical clasp funtions as fastener, allowing the chain a seamless functionality, fitting all the way around with any mechanism or latch. It's quite nice, really, a masterpiece as given to the light as it is averse to the darkness. Item 'an onyx dragonfly pendant' is type jewelry, alignment -333, made of stone, has keywords 'silver onyx dragonfly pendant', equipped around the neck. This item weighs 0 stones and 7 pebbles, and is valued at 52,450 gp. This level 241 item has the attributes: enforce-level invis insulated magic-resistant no-dispel unique An onyx dragonfly pendant is slightly worn. Affects damage by 7. Affects spell-points by 46. Affects saving-breath by -4. Affects ar by -1. *Your Mark of Light must be equal to False to use this item. *This item may be repaired 3 times. Tiny diamonds make up the dragonfly's compound eyes, and silver is its feelers and the links between its segments. The finest silver filigree has been spun for all of its wings. The silver strands and tiny diamonds stand in stark contrast to the dark, polished onyx. It is a beautiful piece of jewelry, a masterpiece as given to the darkness as it is averse to the light. Item 'a tourmaline belt' is type jewelry, alignment 333, made of stone, has keywords 'tourmaline belt', equipped around the waist. This item weighs 0 stones and 7 pebbles, and is valued at 52,450 gp. This level 241 item has the attributes: identified enforce-level invis insulated magic-resistant no-dispel unique A tourmaline belt is in excellent condition. This item has 2 empty Relic bindings. Affects ar-head by -8. Affects ar-torso by -5. Affects damage by 12. Affects accuracy by 3. *Your Mark of Light must be equal to False to use this item. *Your Mark of Shadow must be equal to False to use this item. *This item may be repaired 5 times. Chipped from a single long, broad piece of tourmaline ore, this polished belt's links are connected without seam. Although there is no need for a buckle, since the belt doesn't actually constrict, or even qualify as a belt, there is a buckle anyway, with two binding locations. Although this might somehow insinuate that the belt is lacking in power, due to a lack of pre-selected materials, this is not the case. This belt is quite useful; if only all tourmalines conferred powers such as these, perhaps they would be worth even more!