You can give a whaleskin oil to Sjoru in exchange for a bag of magical holding which will contain 2 of several items including:
Item 'the enlightened eye of Praios' is type jewelry, alignment 250, made of energy, has keywords 'spherical ball energy chain enlightened eye praios fourpointthree', equipped around the neck. This item weighs 0 stones and 4 pebbles, and is valued at 50,800 gp. This level 241 item has the attributes: insulated unbreakable no-dispel unique always-equipment-index Affects hp by 75. Affects prof-prcnt by -10. Affects sp-regen by 3. Affects spells-prcnt by 3. *Your Mark of Knowledge must be equal to True to use this item. *Your wisdom must be greater than or equal to 18 to use this item. *This item may be repaired 4 times. +++ the enlightened eye of Praios will, when its bearer is wearing 2 spellbooks and casts a target offensive spell, deal to that spell's target twice as much damage as the complexity of the spell cast. Item 'a reaper named 'tendonitis'' is type weapon, alignment 0, made of reinforced-wood, has keywords 'oaken scythe weds reaper tendonitis'. This item weighs 0 stones and 81 pebbles, and is valued at 25,000 gp. This level 220 item has the attributes: nodecay level-adjusted This item has a default lifespan of 180 days. Weapon type is scythe, does 152 points of slash damage for 2 stamina, accuracy 15. Special weapon attributes: vorpal *Your level must be greater than or equal to 220 to use this item. *This item may be repaired 4 times and renewed 4 times. +++ a reaper named 'tendonitis' has a chance, in combat, to remove from their wearer's opponent ((3000 - that opponent's maximum stamina) / 50) stamina, at a rate of 50% per combat round.