Nergal in The Blue Crystal Rod

Nergal (ナーガル) is the god of the underworld. Gilgamesh and Ki can talk with him in The Blue Crystal Rod. He has a three-headed dragon named "Dahakku" as guardian.

In Seme COM Dungeon: Drururuaga, one of the initial decks are named after him, which contains seven cards: Goblin, Vampire, Green Slime, Black Slime, Copper Mattock, Potion of Healing, and Book or Rise. If the card "Summons on Nergal" is used, he revives all deceased characters present in the room, both allies and enemies, with full HP.