Progeneration
From Achron Wiki
Progeneration is the Grekim's primary method of producing units. Every basic and Pod class unit can enter progeneration mode. When two units of one type are close together in progeneration mode they can produce the third type of unit at the same or next highest class level (e.g. a Sepi and Pharo can make an Octo or an Octopod, a Sepipod and Pharopod can make an Octopod or an Octoligo). The Loligo class units can split down into two basic class units of the other types (e.g. an Octoligo can split down in to a Sepi and a Pharo). A short video explaining progeneration can be found here and the updated version here.