Wall of Bones

An immobile wall of writhing interlocking bone and bone fragments rises from the earth. The wall is composed of up to one 10- x 10-foot square section, 1 foot thick, per caster level. Unlike the similar spell, wall of stone, the caster may not double the wall’s area by halving its thickness, as the structure is already very porous and would lose its structural integrity, but of course the wall can be made thicker. For instance, a 10th-level caster could conjure a section to fill in a 10-foot cube (10 feet x 10 feet x 1 foot, 10 sections thick). The wall cannot be conjured so that it occupies the same space as a creature or another object. The wall does not require concentration to maintain, but falls to pieces at the end of the spell duration. The spell also differs from the wall of stone spell in that the semi-animated wall attacks those within close proximity to its structure (10 feet) for 2d4 points of piercing and slashing damage from the bones. The structure is not completely solid, so high-strength individuals may attempt to break through with a Strength check, but they take an additional 2d6+1/level points of damage while making the attempt for each 1 foot of thickness that they attempt to move through. A separate Strength check is necessary for each 1 foot of thickness of the wall section in order to break through. The bone wall does not attack the caster or any undead creatures. The wall of bones may be fashioned into simple structures such as ramps or bridges to span a rift, but these uses reduce the size by half so that supporting arches or buttresses can be included.