A pair of rings with a face on each one with half of it a shiny silver with a wing and the other being midnight blue the sides reversed compared to each other.

Once attuned to, these rings grant the ability for a spellcaster to maintain concentration on 2 separate spells. However, if the wielder is attacked while holding double concentration, they have to make a concentration save at disadvantage if the save is a failure then the target has to roll a d20, a 1 will cause both concentration checks to cease, 2-10 will cause the first cast spell cast to cease, 11-19 will cause the second cast spell to cease, a 20 will negate the failed save and allow you to maintain concentration on both spells.