The Champion's Shield is one of the famous traditions of the SkyWings, where the Arena Champion of the currently ruling SkyWing queen may fight for the life of any condemned prisoner. The queen chooses their opponent and if the current Arena Champion wins, the Queen must spare the condemned prisoner's life. If the champion loses, the Queen can execute said prisoner. The only Arena Champion that we know of is Peril.
Although this is unconfirmed, it is thought that Osprey was the one to inform Peril about the shield, but he was unfortunately killed for this by being dropped from a tall height, and, due being flightless because of his paralyzed tail, couldn't stop himself. Peril invoked the Champion's Shield when her mother, Kestrel, was sentenced to death by Queen Scarlet. Scarlet chose to pit Peril against Clay, a dragon with immunity to her fire. Therefore, Peril could not burn him by touch like she could with all the dragons she had faced and killed before. However, before Peril could kill Clay, Glory intervened with her venom, spitting it and, as a result, distorting Queen Scarlet's face. This caused a huge chaos, giving the dragonets enough time to escape from the SkyWing prison.