Take the terrain/hazard goblin druid and make it a Shepherd Druid instead. At level 6, you can summon Wolves/Velociraptors that deal magic damage, and murderize everything. At level 11, you get Planar Bound Annis Hags and can proceed to murder everything. At level 13, you get Korred (control enemy movement and murder them at range, finally) and Planar Bound Bheur Hags (because all the blasting!). Really, not much more to it.