One verb: carve. Dig, and fill back in. That's all.
Narrow passages call up tough species. Blockers grow there, and the corridor itself becomes the gate.
Open space calls up species that win by number. Bodies pile in and smother by area.
Vertical drops call up fast species. The shape you dug is the steering wheel of evolution.
You cannot give orders. Shape is the only language you have.


Dig, and fill back in. No unit commands, no placement, no combat controls at all.
Skeleton to ghoul, ghoul to bone dragon. You don't raise them — you carve the conditions that raise them.
Losing the heart is not game over. You take the downtime, and start again from the terrain.
Spend essence to break the seals below, one at a time.