Let's Join the KISS: Psycho Circus - 24 - Molten Vein (1 of 2)
If you fill a sewer with lava, it is no longer a sewer. What it becomes doesn't have an official name, but "boiling hell-tunnel" works well enough. Despite being a series of liquid death tubes, though, someone still found the time to butter every non-horizontal surface you can stand on.
Spoiler time: If it looks like I know what I'm doing, check to see if I'm playing the game blind. If I am, it's 'cause I got killed a bunch of times. Otherwise... it's 'cause I got killed a bunch of times.
The dragon's high rate of fire and power are probably meant to be balanced by the short range, but with sufficient reflexes and/or health that's easily worked around. It might be tied with wind for the best ultimate weapon at least in terms of damage output (which is the only thing that matters when you're talking about ultimate weapons). Plus it's an actual, living dragon riding around on your shoulder killing things at your command. I mean, for the dragon his life is an endless turret section, but for you that's pretty sweet.