Blink Spell
Blink Description: You 'blink' back and forth between the Material Plane and the Ethereal Plane. You look as though you're winking in and out of reality very quickly and at random.
Blinking has several effects, as follows.
Physical attacks against you have a 50% miss chance, and the Blind-Fight feat doesn't help opponents, since you're ethereal and not merely invisible. If the attack is capable of striking ethereal creatures, the miss chance is only 20% (for concealment).
More: D&D Spells for Blink