This was originally a spell. Earth magic for mage heroes.
But the downside of the cloud is that it hovers over one spot - three by three cells.
Added after 39 minutes
And regarding the Inferno ability and trump cards, it turns out it's not all that bad. Let's read the manual:
The total health of the summoned unit will be equal to X% of the total health of the army at the beginning of the battle.
That is, the size of the summoned army depends not on the number of units in the stack that we summon, but on the entire army at the beginning of the battle. So, at the end of a large battle, you can summon a decent stack to the desired location on the map!
