"Evlin" spell - how does it work?

[Dargor]

As I remember for more than one cell but usually it moves in the next turn. It attacks any troop - yours too, and living ones will be killed and undead will be resurrected. Second level of the spell is enough for comfortable and effective use. This spell is MUST HAVE if playing with undeads.
It's important - any units moved by itself to the cell with evlin loses all his action points so you have to use spells ore other units' abilities. Mage has great chance to create evlin and TELEPORT a unit on it during one turn.
It's important too - evlin can be created only on remains of killed stack and some kinds of units don't leave them. For example you can't create evlin after killing ghosts and droids.