De Grattle's Charms

Initially, there were 12 of these charms, created for his grandchildren to help protect them from harm.
These charms appear as small glass orbs with tiny glowing red stars floating around inside, spinning in a slow orbit. To work best, they need to be worn around the neck.
They are indestructible unless the wearer willingly chooses to break their own charm. Breaking a charm activates the magic of all the charms within 1 mile and extinguishes their magic forever.
Anyone wearing one of the charms is reset to their healthiest moment in the last 10 minutes. All memorized spells are regained, as are all power points and spell slots which were used in the last 10 minutes. For practical purposes, the character is reset 10 minutes (unless for some reason they were healthier at some point during that time.) Non-magical equipment worn is also repaired as well as all most magical items to their most functional state of the last 10 minutes. The only items not restored are those used in the last 10 minutes with temporary magics like scrolls, potions, and charges.
The physical location of all wearers remains the same, though if they were in a prone position they will now be fully alert and standing. They will also retain all memories of events up until the time the charms were used. Positive spells cast during the 10 minutes are retained while negative spells are removed. De Grattle indicated that powerful death magics and death by dragon’s breath may not be reversible.