Warg Wolf is a Soul of Rebirth enemy in Final Fantasy II, likely derived from the Final Fantasy I Wolf monster recolor. They are only moderately dangerous, as they only attack physically, though they can inflict Poison when attacking. They can be dealt with in any manner, though the quickest way to defeat them is to use a group-cast of Teleport of level 8 or higher. They usually travel in groups of four.
Wargs or Worgs are mythical Norse wolves, specifically Fenrir and his sons Sköll and Hati. Based on this, J. R. R. Tolkien in his fiction used the Old English form warg to refer to a wolf-like creature of a particularly evil kind.