Yet another newbie stuff from Jeremy Wagner. This is however superior to its predecessor, but still not great. We now know that the getting-stuck situations are deliberate. Here's a hint: whenever you see a room with two switches, save. One of them is bad and will shut your progress.
I must commend the author for adding HHE and custom sprites though. The HHE is interesting because it replaces the Ethereal Crossbow with an Ice Crossbow, which in good Raven tradition fires fragmentation shard projectiles (the ones fired by the Iron Lich), and they work perfectly with the player. It also makes the Crossbow really powerful on its own. The only port I know which can load HHE is Chocolate-Heretic. Use
-file incubus.wad -merge sprites.wad -deh hack.hhe -hhever 1.2
to run it.
Unfortunately the mod is really not stable and is prone to crashing Chocolate-Heretic, so it only gets 1 star. Sorry. Without the crashes it would have got 2 stars for the modding effort, because the level design is still bad.
A fairly solid level, with some odd design decisions. It seems to be the first wad with a sizeable slaughter scene. It's also the first wad which uses the E2M6 music. One warning though. After the blue key, there's a deadly crushing floor. Either save before it or make sure to run fast. The level also seems to have a quick exit, though it's not obvious.
A couple of highly different maps.
First map is pretty trash. It tries to challenge you but is full of bugs and accidental dead ends, so you need to save at key moments.
Second map is better, though less structured, but good enough to redeem from the ugliness of the first map.