History
Exogenesis is a process of inhalation of the Exogen Spice, a mutagenic substance, that gives Inhuman Dire Wraiths their powers.[1]
Using exogenetically charged waters, Maximus was able to help Black Bolt recover from the power loss he suffered after the detonation of the Terrigen Bomb.[2]Trivia
The eXogenetic story arc wasn't about Exogenesis in the Inhuman way to use the term.