Ultra Hydra

Ultra Hydra is a unique Vex Hydra encountered in the Quest A March of Fire.

Trivia

 * The Ultra Hydra is one of the few bosses that appear in a mission that cannot be replayed.
 * In addition to this, it's the third of three bosses that aren't named or titled properly, the other two being the Ultra Captain and Ultra Knight.
 * This makes it the only unnamed Vex Ultra.

List of appearances

 * Destiny
 * The Taken King