Mark of the Shadows

A dark mark is a birthmark appearing on a Dark Signer's arm.

Each mark corresponds to one of the five Earthbound Immortals. This mark was given to Kyosuke Kiryu, Misty Lola and Carly Nagisa by this evil Gods themselves, when each person was close to dying. Whether the same applies to the other Dark Signers, Rudger and Demak is currently unknown.

Having the dark mark, allows the Dark Signer to use the corresponding Earthbound Immortal, as a card.

Birthmark	Dark Signer	Earthbound Immortals
Spider	Rudger	Uru
Monkey	Demak	Cusillu
Lizard	Misty Lola	Ccarayhua
Hummingbird	Carly Nagisa	Aslla piscu
Giant	Kyosuke Kiryu	Ccapac Apu
Killer Whale	Greiger	Earthbound Immortal - Chacu Challhua

The Signer equivalent of the dark mark is the Mark of the Dragon. Both identify a person belonging to either group and react to one another whenever a Dark Signer and a Signer are in near one another. Also both mark are active while a Dark Signer and a Signer are facing against each other within a Shadow Duel.