Earth Barrier A5E

1st-level abjuration

Casting time: 1 reaction, which you take when you are targeted with a ranged attack
Range: 30 feet
Components: V, S
Duration: 1 minute
Save: Dexterity

Choose an unoccupied space between you and the source of the attack which triggers the spell. You call forth a pillar of earth or stone (3 feet diameter, 20 feet tall, AC 10, 20 hit points) in that space that provides you with three-quarters cover (+5 to AC, Dexterity saving throws, and ability checks made to hide).

Source: Adventurer's Guide (EN Publishing) · License: Creative Commons Attribution 4.0 / OPEN GAME LICENSE Version 1.0a details