How to add a Buff?

Hi guys. I’m kinda frustrated cause I cant find anything that really solves my Issue.
So in short; What am I trying to achieve?

  • Whenever a Player picks up a Featherlight → Get an AOE HP Regen Buff(similiar to the Daedon)

It seems that is muuuch much harder to implement. As I said, I cant find anything that really helps me or solves it… I’m new to modding and I really hope someone can help me out or lead me to a good Tutorial…
Thanks!