I could maybe see including a very small chance for a nymph in the spins, maybe like 1% of the time in platinum have there be one nymph in the reels. (so 1/100 of the time you'd have a chance at one. there'd be of course then 1/10000 that two different nymphs were in the reels, and so on) Another thing that would be cool is if people who made it to #1 in arena rankings got some sort of reward, like maybe there was a draw every so often (every week/month?) and everyone who had been at #1 rank at some point was entered, and one name from each league was drawn to get a free nymph.