The Great Serpent

Flying, vigilance
When The Great Serpents enters the battlefield or dies, create a red, blue and white enchantment aura token named Serpent's Teachings and attach it to another creature you control. It has "Enchant creature. Enchanted creature gets +1/+0 and has flying, double strike and vigilance."
The eldest of the noble dragons, even it cannot remember a time before the Cradle.