Talisman of Fate

Wondrous item, legendary (requires attunement)

This item consists of a flat gold disc engraved with eight arrows in a radial pattern. While wearing this talisman, you can use your action to undo a single recent event by forcing a reroll of any roll made within the last round (including your last turn). You can force the reroll to be made with advantage or disadvantage, and you can choose whether to use the reroll or the original roll. Reality reshapes itself to accommodate the new result.

Once you have used the talisman in this way, you cannot use it again until the following dawn.