Death Immortal Lake in Emperor Domination? I know it's a Burial Ground but it's never mentioned or I can't find it?? Spoiler Death Immortal Lake takes a Darkness Giant Corpse in 9Worlds Catastrophe. I imagine they reach legendary level as this being could even injured Li Qiye. It's really weird since these corpses were meant to strengthen the worlds but hardly said who got strengthen? Only Immortal Lake showed up.
I don't think it has ever been confirmed where it is. But iirc from reading the raws I got the impression it was another Burial Ground in the Sacred Nether World. It fits the theme.