This question has gone through several rounds of open/close and it's unclear to me what the status to be.
I had the first comment to the question asking for a better understanding of the bounds question: specifically asking bout:
What options have you already found in your own research? What sourcebooks are to be included? Are other UA options available?
It got 4 upvotes in agreement (unclear if folks disagreed, but that'd probably be the reopen votes), but it was also never answered.
I do have general issues around list questions that I think we need to address outside of this one, but overall, this seems very unclear as to the bounds for answering that would be relevant to the querent. In addition to a lack of self-research done before hand.
Answers have come in and they are disparate. Each providing an example or several. But there is no complete answer. This then leads to a question with undifferentiated answers because they are all correct, but all incomplete.
Should we close the question to get the details?