This spell is a part of the Aqua Seed spell chain and is found in the Aqua Seed rune stone.
With this spell you let lose a flood over the battlefield. Water flows from your body rapidly. Everyone caught in the flood takes 4d20 damage from the flood (Allies are subject to half that damage). All are affected. Enemies could attempt to escape the flood with an Impossible Evade Check, they would have a +2 bonus to their evade if of water affinity. Your allies can make a Hard Evade Check, reduced to a Normal Evade Check if they are of water affinity. If your allies or enemies are of flame or desert affinities they get a -2 penalty to their Evade checks. You are lucky though. The spell provides you a bubble to ride the flood out without taking damage or getting wet.
Armor Effect: Glacier's Last Breath (Body Armor Only)
If hit with a melee attack the enemy that attacks you is pushed back 1d6 spaces with a "flood" of magic. They will need to make a Normal Brace check, if they fail they will be knocked down.