Eye of Wagamoto

Description
The Eye is a glowing green stone with a black vertical flaw that resembles a snakelike pupil. It can only be used by a dog, and sits on the bearers collar.

Time Manipulation
Once per long rest, the bearer may use the eye to manipulate time. This can take one of three forms


 * 1) Used as a Bonus Action, the bearer may retake their Action- the original Action is cancelled and a new Action occurs instead.
 * 2) Used as a Reaction, the bearer may reroll an Attack Roll or Saving Throw.
 * 3) At the DM's descretion, the bearer may rewind time.  Everything from the past (???) is undone, causing immense stress & hassle for the DM.  The bearer and their party remember everything that happened in the original timeline.

Origin
This Eye of Wagamoto is a powered down version of a magic item that appears in the excellent Dungeons & Doggies rules by Steam Forged. Check them out.