In “Achievements” replace with

The criteria for an Achievement must be met between the moment just before the first Spell is cast during a Duel and the moment just before the creation of the reply to the duel post specifying which spells were cast.

with

The criteria for an Achievement must be met between the moment just before the effects of the Duel’s selected Gewgaws, if any, that occur before spells are cast are applied and the moment just before the creation of the reply to the duel post specifying which spells were cast.