UPDATE: I have tracked it down, it is from the 1997 map ‘El temple del sol’ by Rob Marton (nn6) when you fight the “4 core minions” (fire/lava shamblers) while dodging two chthons - if anyone is curious to check it out - I think it is really cool
Original post:
Hello, I am trying to find a map that I think was from the 2000s that had a memorable boss fight area. I think there is a chthon fight; the most distinct thing I remember is you are fighting shamblers in this area while dodging the chthon and the shamblers have a story related theme with the map saying something like “first, kill the ice shambler, now kill the fire shambler” and I think the map/mod reskinned the shamblers in this area to follow those themes.
It was a big cubic (had a ceiling) room with dark (metal?) textures and two symmetrical ledges on each side connected by a thin beam, with lava as a hazard between them. Either the middle beam had the button to electrocute the chthon or was where you get the rune i think.
I drew a rough sketch in paint from a bird’s eye view of how I remember the room being designed with some of the areas labeled.