Witch! Morrigan is pretty powerful, as mages go. She's got a full arsenal of elemental magics, a healthy little black book of curses, and is a master shapeshifter. Monster-spider, bear, a stinging swarm of insects...Morrigan can be quite fluid in what form she wears. She also mentions having been a wildcat, wolf, and other animals in-canon, so it's safe to say her range is quite large, limited only by the animals she has exposure to learn from.

Her big weakness is her healing spells. She has one she can cast fairly frequently, but it isn't very powerful.