ToME: the Tales of Maj'Eyal

I suppose with dark vision creeping darkness should not block LOS for the feed

You're right, you can't target a lot of things through creeping darkness. Technically this is a bug. Dark Vision acts more like a detect spell when it comes to seeing through creeping darkness. Its a bug I left in for a long time because I wasn't sure if I wanted to fix it. Creeping darkness seems like it could be too powerful if you could just blast all of your enemies from a completely safe position. I might take this up if I start to get more feedback on it.

I probably should fix Feed to not activate and require cooldown when it fails immediately though. That is annoying. I might also look into targeting to make this work a little cleaner.

Is creeping darkness that spell that causes permanent darkness in an area that can't be countered by Illuminate? I haven't tried dispelling it (assuming you can dispel an area -- I don't use that spell).

No its a bit more like a smoke cloud (or smoke monster?) that creeps to nearby squares. It blocks line of sight like an wall or tree but you can pass through. You can see what's in the square, just not past it. Dark Vision allows you to see creatures through it and through normal darkened squares (like infravision). Essentially you can see them, but they can't see you.