Armament of Klaratar

A mysterious handle found in the lair of the beholder Klaratar. Once acquired the handle automatically turns into a weapon the player is proficient with. This weapon regardless of type deals 1d12 with the only bonuses coming from the weapon specified. Killing a creature with this weapon automatically turns the creature into gold equal to their xp. However it comes with a cost, every enemy fell with this weapon removes either 1 intelligence or wisdom ability score, depending on a d2 roll. 1-intel, 2-wis. With a limit of 5. If a player continues using this item after both scores have been depleted, in order for the enchantment to take effect the player must make a dc 15 intelligence or wisdom check.