A trainer is a NPC that is used to level commanders. Trainers are mostly level 38 NPC's but are sometimes level 34 NPC's for lower level alliances who cannot afford to maintain a high level 38 NPC.
How to use a trainerEdit
Trainers contain many units but like all NPC's, contain no commander so they can be crushed with ease. Because of this, you can use an army to level your commanders.