I've heard people talking about an onyx ring from mobilizing armies as some sort of reward. Is this real or now? And if it is real how do i get it?

The Onyx Ring is not a reward itself, to obtain it you must either buy it from another player or craft it.

 

 

 

The true reward from the mini-game is to enchant it so it gives some attack and defence boosts, same as with other rings, you can find the list in the Mobilising Armies article in the Knowledge Base