Earthfast

(Magic of Faerun, DnD 3.0)

Transmutation

Level: ; Druid 2
Components: V, S
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./2 levels)
Area: One stone structure or rock formation, up to 25 cu. ft./level
Duration: 10 minutes/level (D)
Saving Throw: Fortitude negates (harmless, object)
Spell Resistance: Yes (object)

You reinforce a rock formation or stone structure.
The earthfast spell doubles the structure's hit points and hardness.
The spell collapses if you move beyond the range of the spell.
This does not function on constructs.