A little trick to help understand spell text. First, pretend that you are actually the Mage. Player and Mage are synonymous in Mage Wars. Then, read each spell as though it is talking directly to YOU, the Mage. This perspective never changes no matter what is casting the spell.
On Remove Curse and similar spells, it gives the direction to "Gain 2 Mana." In English, directions like this have an implied "you" as the subject. The direction to "Gain 2 Mana" is being given to "you" the person/mage being spoken to.