Alter Fate

You touch a willing creature, granting them the ability to alter their own fate.

Once during the duration of the spell, when the creature affected by this spell makes an attack roll, an ability check, or a saving throw, they can roll an additional d20. The creature can do this after they have made their initial roll, but before the outcome of the roll is determined. The creature chooses which of the d20s is used for that attack roll, ability check, or saving throw.

The creature can also choose to use this when an attack roll is made against them. The creature can roll the d20, and choose whether the attack uses the attacker's roll or theirs.