When Bucky finds three wyverns eggs in a cave after a mission with the avengers. The smallest one was a beautiful royal green that faded into aquatic blue. The medium sized one was a deep navy blue faded into dark gray. And the last one that was the biggest was black faded into red. Bucky took the eggs and raised them. Trained them. Loved them. The black and red egg got named Reaper. Bucky called Reaper his heart and was closest to her even though he still loved the others. The royal green into aquatic blue got named Seasmoke. Bucky called him his fire. And the last one the navy blue into dark gray got named Nightshade. Bucky called him his talons. All the dragons were trained with for commands in High Valyrian a language that Bucky actually knew even though they did understand English and eventually Reaper would be the only Wyvern Bucky had left as at some point Seasmoke and Nightshade would die.