Dark Eyes is one of Hirudegarn's defensive abilities.
Hirudegarn turns into ectoplasm to prevent damage, and reappears in front of the enemy for a surprise attack. This move seems to be reflexive in nature, making Hirudegarn invincible due to his intangibility. This technique can only be bypassed when Hirudegarn is physically attacking, as he needs to be tangible to make contact with something.
Video Game Appearances
Dark Eyes was named in the Budokai Tenkaichi series, where it is one of Hirudegarn's Blast 1 that allows him to avoid a single attack. Hirudegarn also uses this technique in Dragon Ball Heroes, and in the boss fight against him in Dragon Ball Z: Ultimate Tenkaichi.
In Dragon Ball Fusions, Baby is able to his this technique after possessing Hirudegarn.