[Endoperez]

It shouldn't Transform your mage into anything that would need more research to summon it. So no level-9 units. Also, Magical units should not be included. And as most units (militia, knight, longbowman etc.) come with the training and equipment... There is not much left. All the animals(maybe not hydra), Foul Spawns (heh, these should be pretty rare), maybe some cheaper pretender forms... Well, not cheaper but weaker, as a Wyrm or a Manticore, would be evil! Maybe the Freak of the Freak Lord.

Teraswaerto said no undead, horrors, demons or void monsters. I would say nothing inanimate or undead and no units that are "out of this world", that is, from hell, void, Astral Planes...