I want to express there are two things with unique characteristics. I know it's an oxymoron, so I'll be glad if you suggest me a better formulation. I would express it either like:
a) Christianity, Islam and Buddhism are three of the few religions which draw from the older religions.
b) Christianity, Islam and Buddhism are ones of the few religions which draw from the older religions.
c) Christianity, Islam and Buddhism are some of the few religions which draw from the older religions.
The sentences are just examples that popped in my mind.