Additional damage only applies to cursed Featherfoot magic attacks.
— should be —> ‘Each time the enemy is hit, the enemy will receive extra magic damage based on the Magic Attack of the featherfoot who used the curse.’ (OR shortened to 'additional damage is applied based on the cursing featherfoot’s magic attack.)
I will make a new all-wizard guide/post when wizard rework hits KR server, the popular wizard posts (this one, and more such as sorcerer thread) are outdated.