Board Thread:Questions and Answers/@comment-209.23.243.49-20140527201114/@comment-71.112.206.104-20140527220707

The charm you use for your sealstone is 'off' after you get attacked. So if one person comes along, attacks you for your sealstone, and gets charged for attacking when you have a charm on, the charm then 'wears off'. So after that person has attacked you, other people are able to get it if they win the battle. When you use the charm, it'll only work on one person.