Ice Barrier

Ice Barrier is a mage spell that shields the caster for up to 60 seconds, absorbing damage similar to a priest's Power Word: Shield spell. The shield absorbs physical, magical, and most environmental damage (fall damage is not absorbed). Damage from DoTs such as poison is also absorbed. The total amount the shield can absorb is increased by 80.7% of the caster's frost spell power.

While shielded, spells do not lose casting time due to push-back interruption. However, debuffs such as snares, counterspell, and silence still pass through.

Ice Barrier stacks with the mage spells Mana Shield and Mage Ward, as well as other damage shield spells such as Power Word: Shield.

Calculation
Amount Absorbed = Base Absorb + (Frost Spell Power * .807)

Ice Barrier can be enhanced by Glyph of Ice Barrier, increasing base damage absorbed by 30%. With this glyph, the calculation is

Amount Absorbed = (Base Absorb * 1.3) + (Frost Spell Power * .807)