The "Momu" represented a form of ritualistic education. During these sessions, Yrashu instructors would guide their offspring into the depths of the jungle, imparting the essential skills for Yrashu jungle survival. This educational experience reached its peak with the crafting of a Yrashu mace using the roots of a hmumfmumf tree, a process characterized by its open-ended duration, continuing "take as long as it takes". Given that participation in a Momu was contingent upon tribal affiliation, individuals outside the tribe were required to undergo a formal adoption ritual to become members.
Leading up to the Battle of Baskarn, a contingent of Rebels underwent adoption into a Yrashu tribe and received comprehensive instruction in jungle survival techniques as taught by the Yrashu. Their Momu experience included an encounter with a hrosma tiger. Ultimately, the expertise gained during this period played a crucial role in securing victory against the Empire in the ensuing battle.