Jaggar's Strengthened Bastion

5th-level transmutation (Artificer,Sorcerer,Warlock,Wizard)

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• Casting Time: 1 minute
• Range: Touch
• Components: V, S, M (a diamond worth at least 1,000 gp)
• Duration: Concentration, up to 24 hours

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You may only cast this spell on a structure no bigger than a 20-foot cube. For the duration of the spell, that structure is resistant to all damage. A structure can only be under the effect of one Jaggar's strengthened bastion at a time. If this spell is cast on a structure every day for a year, it becomes permanent.

At Higher Levels. You can cast this spell using a 7th or higher level spell slot. If you cast this spell using a 7th level spell slot if effects a structure up to a 200-foot cube. If you cast this spell using a 9th level spell slot, it effects a structure that can fill up to a 2,000-foot cube.