Does Mask of Foresight's +1 might bonus persist after a unit leaves combat, and does it stack if the unit attacks alone multiple times in the same turn?

Question

Accepted Answer

Yes. Mask of Foresight’s +1 Might is a “this turn” buff and remains on that unit for the rest of the turn after the combat ends (so leaving combat to base or just finishing the fight does not remove it). If the same unit attacks or defends alone multiple times in the same turn, each trigger creates a separate +1 Might buff and those instances stack, so the unit can gain multiple +1 bonuses in that turn.

Final Ruling

The +1 Might from Mask of Foresight lasts until the end of the turn and persists after the unit leaves the combat. Multiple separate triggers on the same unit in one turn each grant their own +1 Might and those buffs stack.

Citing

The +1 Might from Mask of Foresight lasts until the end of the turn and persists after the unit leaves the combat. Multiple separate triggers on the same unit in one turn each grant their own +1 Might and those buffs stack.

You attack or defend alone with a friendly unit and Mask of Foresight's trigger resolves, giving that unit +1 Might this turn. Because each Buff instance contributes +1 Might independently, that granted bonus is a distinct buff instance and therefore adds to any other existing Might buffs on that unit [703]. If later in the same turn that same unit attacks or defends alone again and Mask of Foresight triggers again, it grants another separate +1 Might buff (they stack as separate Buff instances) [703]. The granted +1 Might is labelled "this turn," so it remains on the unit through the end of the turn and does not automatically expire when the combat ends (contrast with effects that explicitly say "this combat," which do expire at combat end) [461.7.b] [710]. If the unit stays a board object (for example, is recalled to base) it remains the same game object and keeps the "this turn" buff. If the unit changes into a non-board zone and becomes a new game object, temporary effects on the original object no longer apply to the new object [FAQ:unleashed#22].

If the unit's Might increases past 5 because of multiple stacked +1 buffs, it "becomes Mighty" at that moment as specified by [709]. If an effect doubles a unit's Might for the turn (for example, Dominus), that doubling applies to the unit's current Might including any "this turn" buffs that are already applied; evaluate current Might accordingly [710]. If the unit is Killed and then recalled as a result of another effect that sends it to base without creating a new game object, its buffs that were "this turn" and still active should remain if the object is still the same. If the Killed event moves it to a non-board zone (creating a different game object when it returns), those temporary buffs will not persist on the returned object [FAQ:unleashed#22] [143.2.a]. If the card that granted the buff somehow stops being relevant (for example, an attachment with a Might Bonus being removed), that separate rule is governed by Attachment / Might Bonus rules; Mask of Foresight is a triggered effect that grants a temporary buff and is not an Attached card, so the normal attachment rules do not apply [137].

The text of Mask of Foresight is an effect that grants a unit +1 Might "this turn" when it attacks or defends alone. Each time that trigger resolves it creates a separate Buff instance that contributes +1 Might to the unit [703]. Because the buff is worded "this turn," it lasts until the end of the turn rather than expiring at the end of the combat; the Core Rules explicitly call out that effects that say "this combat" expire at combat end [461.7.b], whereas examples of "this turn" effects show their duration lasting to turn end [710]. Therefore, if the unit leaves the combat (for example, the showdown/combat finishes or it is recalled to base) it remains the same game object on the board and retains the "this turn" buff for the rest of the turn. If Mask of Foresight triggers multiple times on the same unit in a turn, those are multiple Buff instances and stack, giving +1 each time [703]. If the unit's Might increases past the threshold for Mighty because of these stacked buffs, that "becomes Mighty" event occurs at the moment the unit's Might crosses from below 5 to 5 or greater [709]. Caveat: if the unit leaves the board into a non-board zone and thus becomes a different game object, temporary effects on the original object no longer apply to the new object; non-board-zone transitions sever relationships with effects on the original object [FAQ:unleashed#22].