Kingdom augmentation of arms

From MiddleWiki

On rare occasions, the arms of especially worthy recipients are given a special augmentation: a canton, chief or other major addition which includes the kingdom badge of Argent, a pale gules, overall a dragon passant vert.

This is perhaps the highest honor and distinction bestowed by the king and queen, as it visibly sets out the recipient as someone who has had a very noteworthy impact on the life of the kingdom. It may also indicate that the kingdom has run out of other awards and honors with which to recognize the honoree.

See also: Royal Augmentation of Arms