ToME: the Tales of Maj'Eyal

So... helping out our friend Unpronounceable the Wise, I went to go kill the Naga boss in his underwater temple. The battle was a bit anticlimatic, since he and his minions could be "seen" (Not actually seen, just the numbers from damage popping up off the bottom of the screen) killing each other long before I got there.

I wasn't using anything like telepathy, or anything that should have seen them... they just went at each other, with Slasul the only one remaining when I got there.

For me, it happens differently. If I enter the room with Slasul, speak to him after the combat starts and choose to side with him, the nagas become friedly with me, but keep attack each other and dragn turtles (if any are present). I thought it was due to friendly fire that occurs when they start attacking you, but OP's expirience suggests that they possibly start beating each other the moment you enter the level.

There are also some water jet traps in the Slasul's room, including AoE ones, if I recall correctly. Maybe it has something to do with the bug?

Huh... it's been several patches since I've done this fight, so I don't recall what his adds were. I thought you were supposed to be able to talk to Slasul, and indeed he has the talk icon.

So there's mobs from the other faction (water dragons) there? In that case, I guess the battle is supposed to happen, but when I arrived, Slasul shouldn't have been hostile to me, yet he was.

I'm pretty sure it starts from the bug where some monster in vaults are awake anyway even if you never got anywhere in LoS. Then since they are awake but don't know where you are exactly, they start throwing their spells and attacks randomly (so randomly I'm sure I got a troll autoattack himself once with my rogue)

Then one of those random attacks hit Slasul which is NOT in the same faction as the other creatures so that he can be talked to by you. Then he gets angry, then it escalates quickly.

Yeah, I notice it every time I have telepathy - monsters inside vaults sometime threw a spell in a walls.