Otiluke's Force Umbrella

This spell creates a broad, bowl-shaped dome of force over the caster's head, 20 feet in diameter, shimmering violet in appearance. The dome follows the caster wherever he travels. The dome not only shields the caster from rain, sleet, or snow, but also against physical or magical attacks from above, such as siege missiles, giant-hurled boulders, or a breath weapon from a flying dragon.

The force umbrella provides a +4 saving throw bonus against magical attacks from above, and a -6 Armor Class bonus against physical attacks from above. The umbrella also deflects 75% of arrow or bolt attacks from above, including high angle indirect fire (such as a volley of arrows shot in this fashion). The dome conforms to restricted spaces and passes through narrow openings easily.

The material components are a miniature umbrella made of wood and leather and a pinch of diamond dust.

Notes: Uncommon or rare spell (WoG).