What kind of rings you looking for? Any kinds?
Well, in the Katekyo Hitman Reborn! anime, their entire plot is based on the battle for these precious rings that help give them power and stuff, it aired in 2006-2010 though, so Im not sure if that's recent enough for you.
Currently replaying/recording: Tales of Vesperia (Xbox360) and Tales of Graces F (PS3)
<-- Now available