There is a Legacy version
here.
Timeline-Splitting Spell [three-actions] Feat 18Archetype Concentrate Manipulate Source Dark Archives (Remastered) pg. 185Archetype Time MageFrequency once per day
Prerequisites Time Mage Dedication
You invest in two futures, then choose the one to make a reality. You Cast two Spells that each take 1 or 2 actions to cast. These can't be the same spell heightened to two different ranks. You expend the resources for both spells, such as spell slots, Focus Points, and costs, such as gp or valuables. Determine the immediate results for both spells, including attack rolls, saving throws, damage, and any other dice rolls. Then, choose which of the two spells takes effect, using the previously attempted rolls. The other spell's resources are still expended, but the spell has no effect as the magic disappears to the other timeline.
Traits
Archetype: This feat belongs to an archetype.
Concentrate: An action with this trait requires a degree of mental concentration and discipline.
Manipulate: You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can’t perform actions with this trait. Manipulate actions often trigger reactions.