NulTide is a White Magic spell available in Yuna's section of the Sphere Grid. Armor can be customized with SOS NulTide, which casts NulTide when the wearer is in critical status. Whenever NulTide is cast, a glowing blue ball will orbit around the person it is cast on.
Barwater is a Synergist ability that increases resistance to water-elemental damage with a base duration of 90 seconds. It has an ATB cost of 2. It can be learned by Sazh (stage 8), Vanille (stage 7), and Hope (stage 5).