This is my first time doing something like this and I wouldn't necessarily call it a contest or challenge since there won't be any actual winners but I would like it if you could make "Pontifex" cards. For those of you who don't know, a Pontifex is "(in ancient Rome) a member of the principal college of priests." An example of a Pontifex I made is this:
The request: Make a Pontifex
1) It must have the "Pontifex" subtype, any other type is up to you.
2) Any color combination is allowed.
3) It must have "When *name* enters the battlefield, put X Faith counters on it where X is your devotion to [color(s)]."
4) It must have at least one other ability that interacts with the Faith counters, it doesn't matter how it interacts though. It could add/remove Faith counters, it could get bonuses for having them, or anything else.
If you have any questions just ask and I will do my best to answer as soon as I can. I hope you enjoy it.