Intrinsic modifivation
Self-interaction, internal & implicit modification.
It is the intrinsic change in Pudgala. It is instantaneous, continuous (without pause), and incessant (timeless).
This continuous flow of pudgala is parallel to the continuous flow of time.
Microcosmology [2.3.09] Atom In Jain Philosophy - Pudgala G.P. - Types Of Modification