I completely agree wih Varangian on this one.
This boss is ridiculously easy... and boring.
I'm not against a few "puzzles" for bosses but this one is just uninterresting to me and it doesn't make sense at all.
Kiting is not something I like... And seriously, a creature immune to everything except when he enter lava to protect a room in which there's a lever to full it with lava ? Convenient...
There's also a big hammer to weaken the boss when he's finally immune to lava for whatever reason... Convenient once again.
Sorry, but I can't enjoy that.
