Changes

| anime_debut = {{episode|Yu-Gi-Oh! 5D's|02727|ref}}

| anime_deck = [[Ape]]| tf04_deck = * Thousand Year Mixed Pollution* Two Thousand Year Wake* Three Thousand Year Glorification* Four Thousand Year Resolution| tf06_deck = | wc10_deck = Master of the Apes| ydt1_deck = King of Beasts/[[Earthbound Immortal]] ([[Dark Signer]])

'''Devack''', known as '''Demak''' in the Japanese version, was one is [[Roman Goodwin]]'s right-hand man and a member of the [[Dark Signers]]. He freed [[Greiger]] from his prison transport, and offered him the chance to fulfill his desire for vengeance. He was also responsible for the [[Minus Curse]] that infected the [[Duel Monsters Spirit World#Yu-Gi-Oh! 5D's|Spirit World]] with the help of his subordinate, [[Zeman the Ape King (character)|Zeman The Ape King]].

[[File:Demaklineart.png|thumb|left|Lineart of Devack, including his [[Mark of the Shadows]].]]Devack is a tall bald dark-skinned man with purple eyes. He wears the black robes of the [[Dark Signers]] that were accented with yellow stripes; Devack wears his hood almost constantly. His [[dark markMark of the Shadows]] is the monkey. As a Dark Signer, his sclera are black and he has dark red marks running down his face, over his eyes.

===Personality==[[File:Demaklineart.png|thumb|left|Lineart.]]=Devack had great loyalty to the [[Dark Signers]] ' cause and to [[Roman Goodwin|Roman]] in particular. His final words were an apology to Roman for losing.<ref name="ep51">{{episode|Yu-Gi-Oh! 5D's|51|ref}}</ref> He also looked down on those who were not [[Signer]]s, and enjoyed the pain of others, as seen when he tried to show [[Luna]] more sadness by using "[[Ancient Fairy Dragon (anime)|Ancient Fairy Dragon]]" against her.<ref name="ep51">{{episode|Yu-Gi-Oh! 5D's|51|ref}}</ref><ref name="ep50">{{episode|Yu-Gi-Oh! 5D's|50|ref}}</ref>

It is unknown how Devack died and how he became a [[Dark Signers|Dark Signer]], or what grudge he had that allowed him to be revived in the first place. At some point upon his rebirth, he met [[Roman Goodwin|Roman]] and the other Dark Signers, and he pledged his loyalty to Roman. At some point, he was given [[Ancient Fairy Dragon (anime)|Ancient Fairy Dragon]] by Roman to set up his eventual confrontation with [[Luna]]. He appeared out of the original [[Ener-D]] Reactor by arriving by helicopter in order to free [[Greiger]] from custody with an "[[Axe of Despair (anime)|Axe of Despair]]" card, as his transport guard's souls had been absorbed by the "[[Earthbound Immortal Ccarayhua (anime)|Earthbound Immortal Ccaryahua]]". Devack then invited him to join them and get revenge on [[Rex Goodwin]] for the destruction of his hometown. They later picked up [[Misty Tredwell]] and [[Carly Carmine]] from the destroyed [[Arcadia Movement building]] and returned to the Ener-D reactor.

He finally showed himself to his rivals, Devack was present during the Signers, after meetings between Roman's and [[Shadow DuelKalin Kessler]] against , and they discussed recent events as the conflict between the Signers and the Dark Signers escalated. Devack did not take an active role in proceedings until two "[[Yusei Fudo|YuseiEarthbound Immortal]] concluded. Before their departure, he showed Luna that he possessed the s"Ancient Fairy Dragowere Summoned in [[New Domino City]]" card, and so in order to get it back, she must fight him. Later on, as each one of He left the Signers was set on defeating their respective opponent, they split up to each of the four control units of the Original original [[Ener-D reactor. As Luna and Leo were taken ]] Reactor, arriving by helicopter to free [[Tetsu Trudge|TrudgeGreiger]] to where Devack was, she instead went into the from [[Duel Monsters Spirit WorldSector Security]] in order to free custody with an "[[Ancient Fairy Dragon Axe of Despair (characteranime)|Ancient Fairy DragonAxe of Despair]] from her imprisonment with " card, as his transport guard's souls had been absorbed by the the help of her servant, "[[Regulus Earthbound Immortal Ccarayhua (characteranime)|RegulusEarthbound Immortal Ccaryahua]]". However, when Devack invited him to join them and get revenge on [[LeoRex Goodwin]] found for the control unit, Devack approached him while the Monkey geoglyph materializeddestruction of his village. Leo then bravely challenged him, They picked up [[Misty Tredwell]] and stating that if he defeated [[Carly Carmine]] from the Dark Signer then Luna wouldn't have destroyed [[Arcadia Movement building]] and returned to Duel himthe Ener-D reactor.

Despite DevackHe finally showed himself to his rivals, the Signers, after Roman's warning that [[LeoShadow Duel]] against [[Yusei Fudo]] wouldn't be able concluded. Before their departure, he showed Luna that he possessed the "Ancient Fairy Dragon" card, and so in order to save himself and his sisterget it back, she must Duel him. Later on, as he was not a Signer, each one of the Duel Signers was still set on. Devack was quickly able defeating their respective opponent, they split up and headed to inflict damage to his opponent at each of the four control units of the start, but Original Ener-D reactor. As Luna and Leo counterattacked with "were taken by [[Power Tool Dragon (anime)Tetsu Trudge|Power Tool DragonTrudge]]"to where Devack was, his ace card. Devack then Summoned she instead went into the [[Dark Synchro MonsterDuel Monsters Spirit World]], " in order to free [[Zeman the Ape King Ancient Fairy Dragon (animecharacter)|Zeman the Ape KingAncient Fairy Dragon]]". Eventually, Leo was able to destroy his Dark Synchro Monsterfrom her imprisonment with the the help of her servant, at the exact same time that Regulus destroyed [[Zeman the Ape King Regulus (character)|ZemanRegulus]] in the Spirit World, by utilizing his "Power Tool Dragon". However Devack Summoned his true ace card, "when [[Earthbound Immortal Cusillu (anime)|Earthbound Immortal CusilluLeo]]"found the control unit, Devack approached him while the Monkey geoglyph materialized. He attacked [[Direct attack|directly]]Leo then bravely challenged him, but Leo prevented himself from being and stating that if he defeated. Then, the Dark Signer then Luna arrived, and took Leowouldn's [[t have to Duel Disk]] and the twins Dueled togetherhim.

Despite Devack's warning that [[File:Demak DustLeo]] wouldn't be able to save himself and his sister, as he was not a Signer, the Duel was still on.jpgDevack was quickly able to inflict damage to his opponent at the start, but Leo counterattacked with "[[Power Tool Dragon (anime)|thumbPower Tool Dragon]]", his ace card. Devack then Summoned the [[Dark Synchro Monster]], "[[Zeman the Ape King (anime)|leftZeman the Ape King]]". Eventually, Leo was able to destroy his Dark Synchro Monster, at the exact same time that Regulus destroyed [[Zeman the Ape King (character)|Zeman]] in the Spirit World, by utilizing his "Power Tool Dragon". However Devack turning into dustSummoned his true ace card, "[[Earthbound Immortal Cusillu (anime)|Earthbound Immortal Cusillu]]".He attacked [[Direct attack|directly]], but Leo prevented himself from being defeated. Then, Luna arrived, and took Leo's [[Duel Disk]] and the twins Dueled together; Devack expressing thanks that he was able to Duel a true Signer.

[[File:Demak Dust.jpg|thumb|left|Devack crumbles into dust.]]However, Devack Summoned "Ancient Fairy Dragon", and later sacrificed her to prevent the destruction of "Cusillu". This ultimately backfired for him, as Luna used Leo's "[[Respect Synchron]]" to Summon "Ancient Fairy" to her side and used its [[[card effect|effect]] to [[destroy]] "[[Closed Forest (anime)|Closed Forest]]" thus [[negate|negating]] all the effects of "Cusillu" and rendering it useless. Then Luna assaulted it with "Power Tool Dragon", weakening it and then destroyed it with "Ancient Fairy Dragon". The Duel ended with , defeating Devack's defeat.

Regretting his defeat, Devack turned into dust while asking Roman for forgiveness for failing the Dark Signers. (In the dub, he tried to drag Leo and Luna with him to the Netherworld, but failed when Yusei came in and saved them).

[[File:DEMAKALIVE.jpg|thumb|Devack upon returning aliveis returned to life.]]When Rex Goodwin was defeated in the final battle and the [[King of the Netherworld]] was destroyed, Devack was restored to life, along with the other Dark Signers except for Roman and Rex himselfthe Goodwin brothers. It is unknown if whether he kept the his memories of his time as a Dark Signer.

==Non-canon Other appearances=====Yu-Gi-Oh! 5D's Tag Force 4==={{Main|Devack (Tag Force)Character other appearances}}In ''[[Yu-Gi-Oh! 5D's Tag Force 4]]'' Devack appeared as a Partner character and could only be found at nightfall after completing [[Luna (Tag Force)|Luna]]'s story.

===Yu-Gi-Oh! 5D's Duel Transer=Deck==In Devack uses an '''[[Yu-Gi-Oh! 5D's Duel TranserApe]]'', Devack was found ' Deck which primarily focused on the fourth floor of Bifrost. If you have filling his [[Graveyard]] with [[Beast]]-[[Type]] [[Monster Card|monsters]] for his "[[Earthbound Immortal CusilluClosed Forest (anime)|Closed Forest]], he appears without his cloak". Beating him unlocked his He also used several [[support]] cards for [[Deck RecipeDark Synchro Monster]] at the card shop and enabled the player to continue Dueling him in Free Duelss.

{{Decklist||effect monsters =* [[Earthbound Immortal Cusillu (anime)|Earthbound Immortal Cusillu]]* [[Fighter Ape (anime)|Fighter Ape]] x3* [[Magician Ape (anime)|Magician Ape]] x3|dark tuner monsters =* [[Dark Tuner Dark Ape (anime)|Dark Tuner Dark Ape]]|synchro monsters =* [[Ancient Fairy Dragon (anime)|Ancient Fairy Dragon]]<ref group=DecksNotes name=AFD>He acquired this card from [[Roman Goodwin]] before his Duel with [[Leo]] and [[Luna]]. It is returned to Luna after he is defeated.</ref>|dark synchro monsters ={{main* [[Zeman the Ape King (anime)|Zeman the Ape King]]|spells = * [[Axe of Despair (anime)|DevackAxe of Despair]]<ref group=Notes name=Freeing>He freed [[Greiger]] with this card in [[Yu-Gi-Oh! 5D's Decks- Episode 039|episode 39]].</ref>* [[Closed Forest (anime)|Closed Forest]]* [[Dark Wave (anime)|Dark Wave]]|traps =* [[Cursed Prison (anime)|Cursed Prison]]* [[Dark Matter (anime)|Dark Matter]]* [[Roaring Earth (anime)|Roaring Earth]]}}

Devack played an '''==Duels=={| class="wikitable card-list"|-! scope="col" | Opponent(s)! scope="col" | Episode(s)! scope="col"| Outcome|-| [[ApeLeo]]"'/[[Luna]] || [[Yu-Gi-Oh! 5D's - Episode 047|47]]-[[Yu-Gi-Oh! 5D's -themed Episode 051|51]] || Lose|} ==Trivia==* Devack was the only [[BeastDark Signers|Dark Signer]] whose death and transformation into a Dark Signer was never explored.** He was also the only Dark Signer to not have more than one duel in the anime.* According to the ''[[DeckYu-Gi-Oh! 10th Anniversary Animation Book]]. His "'', and ''[[Earthbound ImmortalYu-Gi-Oh! Tag Force 6]]" card '', Devack hails from a cult of demon worshipers, and was "sacrificed to the cult's Gods and reborn as a Dark Signer.** It is also stated that, after his revival, [[Earthbound Immortal Cusillu (anime)|CusilluGreiger]]"kept an eye on him to make sure he wasn't up to anything nefarious.