Barrier Ring (also known as Wall Ring in the SNES/PS version) is an accessory in Chrono Trigger. Boosting Magic Defense by 10 points, this ring can be worn by any party member. In the Black Omen charm the top section of Giga Mutants for the Barrier Ring or open the Sealed Chest in Heckran Cave, which also nets a Speed Ring. Atop Death Peak an additional Barrier Ring sits within an ordinary chest.