One fragment of J'Lynh hid in the Temple of Emissary, guarded by the 'Lady Grace', and with the temple grounds' timely destruction, one tiny mote has been bestowed upon the party.
If the need is great, the party can choose to ignore one single attack roll, damage roll, ability check, or saving throw that they or a creature that they can see has rolled. The party must choose to do so immediately after the roll, and before any results of it are applied.
If so, the creature immediately rerolls and must use the new roll, and this feature cannot be used again until Divine Intervention has reset.