Atlantean Support [Written]

[Thomas★Zero]

Atlantean Princess
lv 1 WATER
Sea Serpent/Effect
If you control no monsters or all monsters you control are Sea Serpent monsters, you can Special Summon this card (from your hand.) You can only Special Summon "Atlantean Princess" once per turn this way. If this card is Normal or Special Summoned: You can discard 1 card from your hand; Add 1 "Atlantean" card from your Deck to your hand. You can only use this effect of "Atlantean Princess" once per turn.
ATK/300 DEF/200

Atlantean Diver
lv 2 WATER
If all monsters you control are Sea Serpent monsters, you can Special Summon this card (from your GY), also, for the rest of this turn, you cannot Special Summon monsters from your Extra Deck except WATER monsters. You can only Special Summon "Atlantean Diver" once per turn this way. If this card was sent to the GY for the activation of a WATER monster's effect: Target 1 card your opponent controls; banish the targeted card. You can only use this effect of Atlantean Diver" once per turn.
ATK/1200 DEF/0

Atlantean Beast Tamer
lv 3 WATER
If this card is Normal or Special Summoned: Add 1 "Atlantean" Spell/Trap card from your Deck to your hand. If this card was sent to the GY for the activation of a WATER monster's effect: Target 1 card your opponent controls; Special Summon 2 "Atlantean Beast Token (Sea Serpent/WATER/Level 3/ATK 800/DEF 0), this token cannot be tribute or be used as material except for a WATER monsters. You can only activate each effect of "Atlantean Beast Tamer" once per turn.
ATK/1600 DEF/0

Poseidra, the Atlantean Dragon Deity
WATER
Link: DL, D, DR
Sea Serpent/Link/Effect
3 WATER monsters
Your opponent cannot activate cards or effects in response to the activation of Sea Serpent monsters effects. You can only use the following effects of "Poseidra, the Atlantean Dragon Deity" once per turn.
* If this card is Link Summoned: Destroy all Spell/Trap cards your opponent controls, then, all monsters your opponent controls lose 300 ATK for each card destroyed this way.
* You can discard 1 card from your hand; Destroy 1 monster your opponent controls.
* If this card is destroyed by battle or by an opponents card effect: You can Special Summon 1 "Poseidra, the Atlantean Dragon" from your hand, Deck or GY.
ATK/2800 LINK-3

Atlantean Royal Force
Spell Card
Add 1 "Atlantean Princess" and 1 Level 4 or lower WATER Sea Serpent monster with a different name from your Deck to your hand, also, for the rest of this turn, you cannot Special Summon monsters from your Extra Deck except WATER Sea Serpent monsters. You can only activate 1 "Atlantean Royal Force" per turn.

Atlantean Kingdom
Field Spell Card
(This card is always treated as "Umi".)
All WATER monsters gain 500 ATK and DEF. Level 3 or lower WATER monsters cannot be destroyed by battle or by your opponents card effects. During your Main Phase: You can target 1 "Atlantean" monster in your GY; add the targeted card to your hand. You can only use this effect of "Atlantean Kingdom" once per turn.

Roar of the Atlantean Dragon
Trap Card
If you control a "Atlantean" monster, you can activate this card from your hand. When an opponent's monster declares an attack: Negate that attack, then, inflict damage to your opponent equal to that monsters original ATK. If you control a "Poseidra" monster while this card is in your GY: You can banish this card in your GY and target 1 face-up card your opponent controls; negate the targeted cards effects until the End Phase this turn. You can only activate 1 "Roar of the Atlantean Dragon" per turn.

Wrath of the Atlantean Dragon
Counter Trap Card
If you control a "Poseidra" monster, you can activate this card from your hand. If your opponent activates a Spell/Trap card or a monster effect while you control a "Atlantean" monster. Negate the activation and destroy it, then, if you control either control a Sea Serpent monster with 2800 or more ATK or 3 Level 3 or lower Sea Serpent monsters, set this card instead of sending it to the GY. You can only activate 1 "Wrath of the Atlantean Dragon" per turn.

[WhiteThunder777]

These are so cool as a whole.  Should help the archetype in the long run.