Wand of Mortal Magic
A human ulna, browned with centuries of age and use, serves to bolster a wizard’s magic at great cost. Using the wand drains the caster’s life force in exchange for magical force, leaving the caster weakened until she’s had time to rest. Invoking the wand during a spell casting, allows the user to sacrifice 2 HP to gain +1d on the spell check, or sacrifice 4 HP to gain +2d on the spell check. Its use is limited to three times per day.