Staff of the adder

A Staff of the Adder is a magical staff with an animated snake head.

Appearance
Fearne's staff is wooden and has flowers growing from it. It has two green adder heads at its top and a hook from which a lantern hangs.

Properties
The wielder can use a bonus action to speak a command word and animate the snake head at the top of the staff for 1 minute, which can become inanimate again by using a bonus action to speak the command word again.

The wielder can make a melee attack with the snake head, with which they have proficiency. On a hit, the target takes 1d6 piercing damage and must succeed on a DC 15 Constitution saving throw or take 3d6 poison damage.

The animated snake head can be attacked (AC 15 and 20 hit points) If the head drops to 0 hit points, the staff is destroyed. The staff regains all hit points when it becomes inanimate, so long as it isn't destroyed.