Wand of Overexertion (5e Equipment)
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Wand, varies (requires attunement by a spellcaster)
Originally created as a last resort, the wand of overexertion is used by some wizards and other spellcasters who would rather push themselves to their limits in the face of imminent death than die by doing nothing.
The wand of overexertion contains one spell slot of a specific level. When you cast a spell of 1st level and higher while holding this wand, you can expend the wand's spell slot instead of your own. Immediately after you cast a spell using the wand's spell slot to cast it, you take a specific amount of force damage, and suffer one level of exhaustion. The force damage dealt this way ignores your resistance and immunity. After 24 hours you cast a spell with this wand, the wand regains the expended spell slot.
The level of the spell in the wand determines the spell's saving throw DC and attack bonus as well as the wand's rarity and the overexertion damage you suffer after you cast the spell with it.