The Kingsguard

At the beginning of your upkeep, if you are the Monarch, put a +1/+1 counter on
The Kingsguard.
Some had been heroes, some weaklings, knaves, or
cravens. The best of them overcame their flaws, did
their duty, and died with their swords in their hands.
The worst. . . The worst were those who played the
game of thrones.