Congrats! I have always wanted to find a good way to use Steam Armor.
You know, some of these questions would all be answered if people combed the Gamer's Edition player manual, which I have linked from my Ultimate Documentation thread, which no one has stickied (but it really should be).
Although, I do agree that most of this should be IN GAME. Why do I need 10 pdfs to support this game?
<coughs>
Regarding Steam Armor, it only affects "short humanoids", of which the list is
"""
Alchemist, Skeleton Archer, Archimagus, Barbarian, Berserker, Black Knight, Archer, Cannoner, Goblin
with the Catapult, Druid, Dryad, Dwarf, Elf, Pathfinder, Sworsman, Guardsman, Goblin, Violent Goblin,
Cavalryman, Imp, Imp the Mocker, Knight, Miner, Necromancer, Orc, Orc the Veteran, Peasant, Pirate, Old
salt, Priest, Inquisitor, Robber, Marauder, Shaman, Skeleton, Vampire, Werewolf Elf, Ancient Vampire,
Zombie, Decaying Zombie, Demoness, Wood Fairy, Lake Fairy, Foreman, Paladin, Demonologist
"""
Regarding Undead
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Immunity to some spells (Bless, Revival, Armour of the God, Victim, Weakness),
to talents (Vampirism, Dance of Edges, Gobble up a Corpse, Second Breath) and features Absorption of Soul,
to effects (Bleeding, Furiousness, Curse).
Spells Treatment and Life Light cause a loss.
The plague does not influence undead parameters, gives +1 Morals.
"""
I don't know if anyone created an updated manual for Crossworlds. The Warrior Counter-attack seems to simply not work with undead. It does work with quite a few humanoids, and their definition expands far more. e.g. it works on my Shrek team.
Or in other words, it works with LARGE humanoids too.
Or, in case someone does not get it by now, it works on trolls, ogres, and orc chieftain as well.