Memoirs of Delving, The Ptolus Years
Overall, we’re using the AE feat system, which means that feats get broken into three rough categories: General, Talents, and Ceremonial.
Talents can only be taken at level 1, and Ceremonial feats require paying for a ceremony to get them (at minimum, a cost of 100 gp per level, an all-day ceremony, and a week of preparation.)
Also, as per the Book of Experimental Might, every character gets a bonus feat every level, as opposed to every three.
In the interest of not wildly violating the OGL, the complete lists of which feats are ceremonial will not be listed here.