Bolster Object
Warding 6
Though it looks no different, the iron portcullis has become harder than steel. The ram can batter itself to flinders before the portcullis gives way.
Bolster Object is an 6th-level ritual.[Dr366:27]
The target object, which you must touch during the performance of the ritual, increases its hit points by 10% for every 5 points you have on your check result. An object targeted by this ritual multiple times benefits only from the best casting.