This mask resembles a serpent's head. While attuned to this mask, a creature gains the following abilities: 

A creature can use its action to assume a snake-like form. While in this form, the creature can make a fang attack whenever it takes the attack action. This fang attack is made in addition to the normal attacks the creature gets to take on its turn. A creature can be in this snake-like form for a cumulative 10 minutes, and then it must wait until the next dawn to use this feature again. 

Fang. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 7 (1d6 + 4) piercing damage plus 10 (3d6) poison damage.

This mask grants a magical connection to all snakes and snakelike creatures. The wearer can cast the following spells at will: animal messenger, speak with animals, animal friendship, and beast bond. Charisma is the wearer's spellcasting ability for these spells. When one of these spells are cast using the mask, ignore any specifications in the spell descriptions saying that those spells can only target creatures with a certain Intelligence score or that the target must be a certain type of creature. These spells can target and affect any creature; but only if it is a Snake, Yuan-Ti, or other Serpentine creature. 

Notes: Damage, Buff, Combat, Shapechanging, Headwear