Cicollus

Mentioned in 22 Chains of Heaven as a god trapped by the Seree singularity. At some point Cicollus escaped the prison, and at a later time returned with Deel and Panur to obliterate the place. Presumably Cicollus was one of the gods who obliterated the Seree empire. Cicollus is also mentioned in 06 Tannoch Rest-of-Kings and 30 The Call of the Light. In both instances, he seems to relate to obliterating the undead or non-living constructs.

In 5e Dungeons & Dragons

Cicollus is probably related to the Grave domain, even though that's not really how pantheons work in the world of Trilemma.