Do you believe that the institution of the office of the Hand of the King owes a great deal to the very recent deaths of the lineage of the Kings of the Hand, the Gardener Kings of the Reach? The Symbol of the Hand had been one of the greatest and most continual signs of royal authority throughout possibly all of Westeros, and then after the field of fire, where the Gardeners are ‘luckily’ all killed, the Targaryans are immediately able to co-opt this symbol of authority into one of their own.