The walking dead

[Fatt_Shade]

Nice idea for undead, great race and nice combo`s for them. For 5th unit you have more choice then Bone dragons, sinisters/adept of darknes/evil genius/dread eye/ritualist all nice and new undead units
Good thing steam armor works for almost all of them, and it`s among best armor item in game. Also undead have great item sets, Moro dark is best companion pick, but for warrior new kotor is also good pick. So have fun with your playthrough

[DGDobrev]

If you really want to go with undead army, then the Eviln spell is a must. Eviln transforms a corpse into an "Eviln" which resurrects undead troops, and can be used by Warrior hero as well, even through the mana deficiency. That can be achieved by getting the Mana Accelerator skill for your pet dragon, kill enemies, spawn mana accelerators, and finally spawn evilns. If you're out of corpses or otherwise can't use them, level 1 Call of Nature or something similar will net you plenty of corpses, because the stacks you spawn will be small and will die easily.