The spell slinger would throw spells at defences and your troops.

Cost: Level one 1,500 dark elixir, level two 1,750 dark elixir, level three 2,000 dark elixir, and level four 2,250 dark elixir.
Time: 30 minutes
Speed: 16
Attack damage/Heal/Time: Level one 1/14 Level two 1/12 Level three 1/10 Level four 1/8
Space: 20

At level one it would have the lightning spell. At level two it would gain the heal spell. At level three it would gain the rage spell. At level four it would gain the freeze spell. The higher level spells would be used less often than the lower level spells.
The amount of things affected by the spells would be one tower (lightning and freeze) or 4 tiles (heal and rage)