Staff of the Viper (5e Equipment)

Staff, rare (requires attunement)

You can use a bonus action to speak this staff's command word and make the head of the staff become that of an animate poisonous snake for 1 minute. By using another bonus action to speak the command word again, you return the staff to its normal inanimate form.

You can make a melee attack using the snake head, which has a reach of 5 feet. Your proficiency bonus applies to the attack roll. On a hit, the target takes 1d6 piercing damage and must succeed on a DC 15 Constitution saving throw or take 2d4 poison damage.

If you roll a 1 while attacking with the snake head, the staff shatters and is destroyed.