Monster spell: forcefield

[mps]

Pretty much the same deal as in starcraft. Creates an indestructible grate-like obstruction on a tile or collection of tiles. Monsters with the spell either use it to cut off escape routes, block favorable terrain from players (i.e. chokepoints), or prevent players from approaching monsters with scary LoS or smite targeted spells. Mix a monster with this spell into a pack of depths monsters and watch the consumables burn!

[pubby]

Fear and mesmerize in Las Vegas.

[wizzzargh]

I guess this kinda exists already in the form of the Briar Patches or whatever that Thorn Hunters create

[wheals]

I was also thinking it was similar to monster conjure flame, which admittedly is only on ghosts and Natasha right now.

[Sharkman1231]

Don't deep elf knights have it? Or was that removed?

[rchandra]

I was also thinking it was similar to monster conjure flame, which admittedly is only on ghosts and Natasha right now.

Red draconians (if they miss). There's also that holy fire attack. In all of those cases I'm pretty likely to walk through if I want to reposition.
With Thorn hunters, cutting through the briar to run is not generally sensible.