Staff of the Python +1

Like any tools that have seen service over time, this enchanted quarterstaff no longer appears even partly similar to a standard Staff of the Python. Numerous physical and magical attacks deflected over the years have changed this staff: smoothened tips where a serpent-carved headpiece would have once been, wood body hardened and grayed, giving it an almost uncomfortable heft. Any casual observer would not think much of this tool--that just looks like a long, gray pole--and would thusly be foolish to underestimate the number of years of service this staff has left.

This quarterstaff can do 1d6 bludgeoning damage, with a +1 bonus to Attack and Damage Rolls.

Additionally, you can use an action to speak this staff's Command Word and throw the staff on the ground within 10 feet of you. The staff becomes a Giant Constrictor Snake named Monty (see the Monster Manual for statistics, and below image for approximate appearance) under your control and acts on its own initiative count. By using a Bonus Action to speak the Command Word again, you return the staff to its normal form in a space formerly occupied by the snake.

On Your Turn, you can mentally Command the snake if it is within 60 feet of you and you aren't Incapacitated. You decide what action the snake takes and where it moves during its next turn, or you can issue it a general Command, such as to Attack your enemies or guard a location. However, if any player or non-player character utters an insult/critique/comment regarding Monty's appearance, he/she will roll a Charisma challenge roll against the giant snake. If the giant snake does not win the roll, Monty will not act until his next turn, presumably because he is very self-conscious about his looks and battle performance.

If the snake is reduced to 0 hit points, it dies and reverts to its staff form. The staff then shatters and is destroyed. If the snake reverts to staff form before losing all its hit points, it regains all of them.

I google'd Giant Constrictor Snake, and colored the top result in: