Viserion

Viserion was one of three dragon eggs brought to Westeros by Daenerys Targaryen. The egg, initially a deep bronze color, hatched during a funeral pyre when Daenerys walked into the flames. Viserion was named in honor of Daenerys's deceased brother, Viserys.

Viserion was initially the smallest of Daenerys's dragons, but grew rapidly. He was fiercely loyal to Daenerys and was often ridden by her. Viserion participated in many key events, including the siege of Meereen and battles against slavers. He was known for his speed and agility in the air.

Tragically, Viserion was killed during the Battle of the Frozen Ford when he was struck by an ice spear thrown by the Night King. He fell into the icy waters of the lake and drowned. However, the Night King later resurrected Viserion as an undead wight dragon. In this new form, Viserion had icy blue flames and was under the Night King's control. He was instrumental in the destruction of the Wall, breathing fire onto its defenses. Viserion's wight form was eventually destroyed by Drogon and Rhaegal in the Battle of Winterfell.