"You're interested in this scepter of mine, are you? It enables me to see to the heart of almost anything. Remember that! If you're ever plotting something untoward, I'll know about it straight away! Oh ho ho ho ho ho!"
The staff can project images from both the past and present. Whis can use it as a weapon in battle. It is also used by Whis and Vados when travelling between planets as part of their Warp technique. In Dragon Ball Z: Resurrection ‘F’, it is shown that the staff can visually record messages allowing it to function in manner similar to an answering machine or voice mail.
In Dragon Ball Super it is shown that all Angels that serve the Gods of Destruction possess staffs just like this, which they presumably use to carry out their duties as attendants. Inside the staff is a pocket dimension with a hazy atmosphere that the Angel in question can use to presumably pull any kind of being into (whether fellow gods or mortals) when they so choose to. Due to its abundance of godly ki, the pocket dimension has immense gravitational pressure that makes it hard to move about, and time in this dimension flows in a similar fashion to the Hyperbolic Time Chamber. Whis teleported both Goku and Vegeta into this dimension where they learned how to control their ki without leaking, enabling them to move their bodies in the realm.
Noticeably, despite the angel's main duties being to aid their respective lord in sanctioned destruction, the staff can also be used to promote life. By holding it over a mother's pregnant form, the staff can determine the development of the unborn child and subsequently deliver it, warping them out of the mother's body in perfect health. This also provides the mother with no further anguish from giving birth nor possible complications from normal birth and immediately returned her to her original state before pregnancy.
In Dragon Ball Xenoverse 2, Whis claims that it allows him to see into the heart of almost anything.
Video Game Appearances
"Whis' staff, which can show images from the past and is used when moving between planets."
— Dragon Ball Xenoverse 2 Accessory description
Whis' Staff was first named in Xenoverse 2. Whis uses his staff as a weapon in both Xenoverse and Xenoverse 2. In Xenoverse 2, it appears as a wearable accessory for the Future Warrior, though like most accessories its appearance is purely cosmetic and cannot be used as a weapon by the Future Warrior.
As part of the Super Pack 2 DLC, Vados uses her staff to perform several Skills such as Destruction's Conductor, Requiem of Destruction, and all variations of Destruction's Concerto (the Future Warrior uses their finger in place of the staff when performing these skills in Xenoverse 2). Additionally, she also uses it to fire both standard and Homing Type Charged Ki Blasts. She can also use the staff to produce bursts of Kiai which she uses as one of her combos.