God, I hate the first boss in Hell, I can't get past him, I always end up fighting him with 3 health :c
I think it's similar to the white things the Core shoots. It's a combination of the Fireball and the Polar Star, it shoots snake-like projectiles that go through walls.
You also get it at the Labyrinth from the roosterroach guy.
Holy stuff...I just got to The Core. It scared the crap outta me...
I love the music. Especially the title/plantation theme.