Wyverns are a symbol of revenge, retribution, creating protective barriers of fear as a defence, war, envy, pestilence, viciousness. They are a common symbol in heraldry. This gives the Wyvern a nobler connection. It is a sign of strength, power and endurance to those that uses its imagery. One of its most famous imagery is the “burning dragon” of Cadwalladr, or the dragon on the flag of Wales.