u/DinosaurDigger457

Hello all. I've been looking for an answer to this question for a while now. Opportunity Attacks or Attacks of Opportunity. I know the basic idea, and also the "Disengage" Action. Though I am curious about this. Are there any Variant Rules, Class/Species features, Feats, etc. That use, interact with, or allow for Opportunity Attacks? (Both 2014 and 2024 rules.)

I'm not looking for Homebrew or advice about them. Just official First Party material that interacts with or relies on them. Curious about if anyone knows the full extent.