Ill try to keep this brief as i know its a lot of information!
Different abilities come under different areas in our RP. You have Hidden Abilities, Kekkei Genkai, Advanced ninjutsu, Advanced Elements and universal abilities.
Every bio can use the 5 basic elements of wind, water, earth, fire and lightning, as well as the 4 basic skills which is Ninjutsu, genjutsu, taijutsu and kenjutsu.
Now what differs these from the other things ive mentioned above is how theyre used.
For example, someone like the Nara clan with their clan jutsu is classed under a Hidden ability, because its passed dpwn through the family, its taught how to use that skill. A kekkei genkai is an ability woken through bloodlines such as the sharingan. Advanced ninjutsu is applying ninjutsu to other non elemental properties, such as ink ninjutsu. Advanced elements are those that combine two together such as crystal release or steel release. Universal abilities are ones that anyone can learn or use such as fuuinjutsu or kinjutsu.
There are certain rules for most of these howeber because of our customization, you could make an uchiha nara mix, so you could use a sharingan and shadows on the same bio.
Does this answer it a bit
@Shanks shanks?
