Darkhero

"Darkhero" (ダークヒーロー Dākuhīrō) is an attribute and it is currently unique to Hero World.

List of Sets with Darkhero Cards

 * H Extra Booster 2: Shadow VS Hero

Playstyle
So far, the Darkheroes seem to have higher than average stats in exchange of destroying themselves after battling.

Size 0

 * Combatant, Nebad

Size 1

 * Guin of Dark Fist
 * The Scar

Size 2

 * Bluish Purple Warrior, Road Crow
 * Buster Bone Armor
 * Immoralist, Irrational
 * Shadow Hero, Schwarz

Hero World

 * Bluish Purple Warrior, Road Crow
 * But That Guy is The Most Underdog
 * Darkhero First Base
 * You're Already Obsolete