Pyramid Vaulted Ceiling

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==Description==
Even the most world-weary adventurer cannot help but look upon such a sight without awe. It is said the gods themselves reach down just to touch its splendor. For what structure is like the pyramid? Whatever ancient art, science, or sorcery made them remains a mystery to most and a miracle to all.
It is said a ceiling makes a home, makes a civilization. To block out the storm and the predator is to have mastery over them, is to stride boldly out of the food chain.
Weapons barely chip its material, and even explosive powder is not enough to weaken it in a single blow. Siege weapons or divine intervention are really the only way to bring down this wonder.
==Source==
 Created from the following Recipes 
Construction Hammer	Construction Hammer	Construction Hammer	Construction Hammer
Ingredients 	Outcome 	Craft time 	Experiencegained
10 4 3 	1 	0 s 	658
==Repair==
Repairing requires up to:
* 8 
* 3 
* 3