Eclipser

Eclipser is an Unique Triple Stryke introduced in Dragons: Rise of Berk.

Official Description
"This Triple Stryke was bred specifically to dominate moonlit Dragon Fights. It has adapted stealth as its main strategy, opposite to its species norm."

Physical Appearance
Eclipser looks exactly like Sleuther but with black instead of brown and gray instead of yellow.

Trivia

 * Even though it is said that it participates in Dragon Fighting, it did not appeared in the episode Stryke Out.