Wyrmwrath Staff

Once per short rest, as a bonus action, you may
animate the staff for 1 minute. The staff has a
flying speed of 15 feet. As a bonus action you
may command the staff to make a melee spell
attack against a target for 1d8 piercing damage,
and make an immunity Constitution save against
your spell DC or take 1d8 poison damage.
Carved from a green dragon's venomous fang, this
wooden effigy of its former self is still imbued with a
vile poison and a desire to use it.