Shield of Ice

Effect
Shield of Ice targets its caster only.

Increasing Shield of Ice level does not affect the focus cost, but lowers the fizzle chance.

Water Attunement affects the damage avoidance duration, water attunement bonus duration, fire resistance bonus duration, and spell critical damage bonus duration.

Stacking and charging glyphs improve the focus cost, damage avoidance bonus and duration, water attunement bonus and duration, fire resistance bonus and duration, and spell critical damage bonus and duration.

Limits
Shield of Ice will cancel Death Shield, Immolation, Shield of Air, and Shield of Crystal, and vice versa.

External Reference

 * Magic, Combat, and Crafting Skills on the Shroud of the Avatar Forums