Passwall

Passwall is a transmutation spell that breaches walls. The maximum thickness is equal to 1 foot per caster level.

Effect
You create a passage through wooden, plaster, or stone walls, but not through metal or other harder materials. If the wall's thickness is more than 1 foot per caster level, then a single passwall simply makes a niche or short tunnel. Several passwall spells can then form a continuing passage to breach very thick walls. When passwall ends, creatures within the passage are ejected out the nearest exit. If someone dispels the passwall or you dismiss it, creatures in the passage are ejected out the far exit if there is one, or out the sole exit if there is only one.

Variants
The drow variant of the passwall spell can create passage ways through solid stone and dirt, but has a very short duration.

Material Component
A pinch of sesame seeds.