Air Sphere (EFA - A)

You crush the crystal and surround yourself with a 20-foot- radius sphere of breathable air. As part of creating the sphere, you can move it up to 90 feet. If a breathing creature is placed within the sphere, the creature can survive for 1 hour, after which time it begins to suffocate.

This spell is often kept as scrolls aboard Spelljamming ships, for emergency use in case a creature falls overboard