Les cinq cartes Overlord of the Mistmoors, Overlord of the Floodpits, Overlord of the Balemurk, Overlord of the Boilerbilges et Overlord of the Hauntwoods, de l'édition Duskmourn: House of Horrors, forment un cycle appelé "Overlord".
La carte Lurker in the Deep parue ensuite fait référence à ce cycle.

Source 1 (Enchantments that turn into enchantment creatures - "Vision Design didn't envision this as a whole mechanic but as just individual cards. Set Design would then turn it into a mythic rare cycle [...]") - Source 2 (Cellarspawn - "[...] the overlords, which Valgavoth deliberately created to help enact his will and carry out occasional targeted campaigns of terror. There's one overlord for each zone of the House.") - Source 3