Yeoui takes the appearance of a white bo staff with golden tips that is able to grow on command to what the user says. You gain a +5 bonus to attack rolls and damage rolls made with this magic weapon.

Undying Loyalty. Yeoui cannot be lifted by anyone other the creature attuned to it (Not even a successful wish spell could allow someone else to lift Yeoui). If the wielder should die while wielding the staff, that person has the right to choose the next wielder should they have someone in mind. All they need to do is simply picture the person and say their full name. Upon which Yeoui will teleport to that person and forcibly attune to that person. You must be familiar to the person upon which you wish to send the staff to.

Size Alteration. Yeoui's size can be altered according to the user's will. It can grow broader or slimmer and taller or shorter at will, reaching incredible heights. When you speak a command word, the staff can expand or contract at 10 ft per round.

Weight Alteration. When you speak a command word, the staff can increase or reduce its weight by 30 lbs per round, though the staff may not weigh less an a quarterstaff.

Soul Bound. Yeoui can be teleported back to the wielder's location at will.

Enhanced Durability. The staff is unbreakable. The staff is made of something stronger than adamantine, so the staff is indestructible. 

Enhanced Agility. While attuned, Yeoui increases the speed (walking) of the wearer by 10ft. 

Command Words:

• Size Alteration. Yeoui Grow, Yeoui Shrink
• Weight Alteration. Yeoui Heavier, Yeoui Lighter

Proficiency with a Quarterstaff allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Weapon Property: Versatile, Bonus: Speed (Walking), Summoning, Damage, Combat, Shapechanging, Sentient, Versatile, Topple