Game Mechanics: Lavacrawlers proc a poison instead of cast fire

[Nirgon]

Lava duct crawler definitely no DS and the spider from solb.

Lava crawler is a rock snake native to the mountains of Lava Storm. It appears the fire snake burst is also an aoe and should hit nearby NPCs causing them to attack it.

Completely different NPCs in different zones.

LDC/lava beetle, neither had DS. But dot vs fire proc is on point.

[Happyfeet]

I have no idea how I read into that, sorry, my bad.