Errata Suggestion: "make another magic attack roll, increasing the threshold". Spell is not an attack, and the rest of the spell simply refers to them as "magic rolls". Suggest change to say "make another magic roll, increasing the threshold".
Errata Suggestion: "make another magic attack roll, increasing the threshold". Spell is not an attack, and the rest of the spell simply refers to them as "magic rolls". Suggest change to say "make another magic roll, increasing the threshold".