Hardened Surface

4th-level transmutation

Casting Time:1 minute

Range:Touch

Components:V, S

Duration:Until dispelled

Classes: cleric, sorcerer, wizard

You cause the surface of a permanent structure within your stronghold, such as a wall, door, or statue, to become harder and more durable, up to a 10-foot square surface, increasing its damage threshold by 5 and adding 10 hit points to each 5-foot square you affect. The hardened surface extends 1 foot deep into the structure. If you wish to harden the entire thickness of an object that is thicker than 1 foot, you can cast hardened surface repeatedly in the same area, with each casting increasing its depth by 1 foot. While this spell increases the surface’s resistance to physical damage, it does not alter the fundamental characteristics of the material that makes up the structure. A wall of paper or straw still can be set aflame, a structure of snow or ice can melt, and so on.

This spell also can be used to harden structures made of snow and ice.

You must designate a specific location as your stronghold to cast this spell in a ritual taking 24 hours. If you establish a new stronghold, any hardened surface spells you cast in your former stronghold begin to fade, ending after one week.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage threshold increases by 1 and the hit points for each 5-foot section increase by 2.