NHF – new heroes for Heroes V 3.1.

It'll do. Full points, -1 to speed.
The area is good. The trap animation works at any point in the area.
For the Orcs.

The trap turned out to be too inconspicuous. We'll only show it to the owner.

The script that checks the position has a delayed reaction. We'll have to cover all maps with single-cell regions.