One of my favorites that I fell in love with was a particular class on an MMO game called Rift. It was the chloromancer. In practice it was tricky and arguable how effective it is but it was a healer class that provided raid/group heals by doing damage. Your damage attacks would provide the heals.
Just a neat concept I immediately fell in love with.
It made a quick an easy landing point for my transition from Reddit. As I learned more about how the fediverse worked and how instances were set up I realized relatively quickly I wanted to find a new “home base”.