Witherbrand

Witherbrand (+1 Broadsword 2d4+1)
Requires attunement for 30 min
Any creature hit must succeed on DC 17 CON
save or take 1d8* necrotic damage and has
disadvantage on the next Strength or Dexterity
based ability checks or attack rolls it makes until
the end of its next turn.
*All necrotic damage that was dealt can be used
by attuned to restore lost hit points (only to max)