At 7th level, an eldritch font can use her eldritch surge ability to reroll an attack roll associated with a spell or arcanist exploit, or to reroll all of the damage dice associated with a spell or arcanist exploit. In the case of an attack roll, this ability must be used after the die is rolled but before the result is revealed. The eldritch font must take the result of the reroll, even if it's lower. This ability replaces the arcanist exploit gained at 7th level.