Awakened Serpentine Staff

A wooden staff with ornate scale-like carvings covering it. There is a carving of a serpent on the top of the staff, with a crystal-like sphere being held in its mouth. It grants a +3 to your Spell Casting modifier and as a Bonus Action you may change the staff into a living serpent that acts as your companion (See Constrictor Snake stat block. Triple the health, increase damage die by 2, increase DCs to 18). If the staff is not in your hand, you may have it still equipped by it wrapping around your forearm in its Serpent Form, requiring only a Bonus Action to equip it. While in Serpent Form, you make take the following actions:

Venom Spray - The Serpent shoots venom from their mouth at a target you can see within 5 feet of you. The target must make a Constitution saving throw with a DC 18. On a failure, they suffer 6d6 Poison damage and are Poisoned. On a success, they take half damage and are not Poisoned. Can be used 3 times per Long Rest

Coil - The Serpent leaps off of your forearm at a target you can see within 10 feet of you. The target must make a Strength saving throw with a DC 18. On a failure, the target is Restrained. The target may repeat this saving throw on its turn. Can be used twice per Long Rest

Bite - If you fail a grapple check, the Serpent lunges and bites the target for 4d6 Piercing damage. The target must make a Strength saving throw with a DC 18, on a failure, you are no longer grappled. 

Chromatic Scales - For 10 minutes, your body is covered with shifting scales that change color to match your surroundings. While Chromatic Scales is active, you are Invisible. Once per Long Rest.

Reptilian Sense - For 1 hour you can see on the ultraviolet and infrared spectrum. For 1 hour you have Truesight to the extent of the DMs discretion. Once per Long Rest.

If the Serpent's hitpoints reach 0, it reverts back to its Staff Form, however broken. Up to DM's discretion on how to repair it.

Notes: Shapechanging, Wristwear, Sentient