Dark Mage

From Fire Emblem Wiki

Dark Mage
First Seen Fire Emblem: Monshō no Nazo Promotes From Loputo Mage (Thracia 776 only) Promotes To Sorcerer (Shadow Dragon only) Usable Weapon Types Dark Magic Class Skills N/A

The Dark Mage is a class that appears in Fire Emblem: Monshō no Nazo, Fire Emblem: Seisen no Keifu, Fire Emblem: Thracia 776 and Fire Emblem: Shadow Dragon. It is almost exactly comparable to a shaman, although it was a promoted unit in Thracia 776, making it more similar to Druid in that case.

Although the “shaman” is considered to be slower but more powerful than mages in most games, while in Shadow Dragon Dark Mages actually have less magic than mages (During class change a none magical unit going to a dark mage will only gain +2 while mages gain +3) Though they generally have higher defense.

Also, it may be noted that there are no magic types in Fire Emblem: Shadow Dragon. Therefore Dark Mages can use any given Tome (with the adequate spell level) whereas Shamans can only use “Dark Tomes