Some are buildings, like a cemetery that summons imps to fight in place of your slain units.
Some are troops who’ll rush to the centre of the battlefield at the beginning of each round.
Your troops fight automatically, but you do have an important job here.

I’m not sure if I mentioned it already: it’s dropping rocks on heads.
I’m being a touch facetious when I say it’s all about rocks and heads.
I gifted a square to some mercenary units early.

If the full game contains lore, I would like to know where the rocks come from.
Monkey with strong tail?
Answers, like, when the full game launches this April.