ToME: the Tales of Maj'Eyal

Did I read the spell description wrong, or when a second Seer is escorted, does the second level reward have no further effect on this spell, remaining at 12% for 5 turns even after re-activation?

If relevant, the Skeleton Archer has 10 Magic.

Predawn

It is tied to both talent level and magic, if your magic is too low it will not do anything