Starting with a new character, called Ariel and her Water-Element Library, focusing on using a variety of cards in duplicates, triplets or quartets (note the "playset" is 4 cards in Universals).
Little Moray of the Ancients
Water-Element Starter
40 Power
40 Stamina
(Upgrades to <<Atlantis Sentinel>>.)
Atlantis Sentinel
Water-Element Creature
100 Power
130 Stamina
(Upgrades to <<Atlantis Leviathan>>.)
If this card is upgraded from <<Little Moray of the Ancients>>, you can search your Library for 1 <<Atlantis Sentinel>>. Your opponent cannot attack Water-Element Creatures you control, except this card.
Atlantis Leviathan
Water-Element Creature
240 Power
200 Stamina
Cannot be called, except by upgrading from <<Atlantis Sentinel>>. If this card is called, you can search your Library for 1 Water-Element Creature, except <<Atlantis Leviathan>>. Once during this turn, you can choose 1 Battle Mode Water-Element Creature with 150 or less Power, and specifically call 1 copy of that Creature from your Library in Save Mode. While this card has Power less than its original Power, this card cannot be affected by your opponent's Action Cards and Reaction Cards.
Atlantis Shooter
Water-Element Creature
80 Power
80 Stamina
If this card is defeated, you can specifically call up to 3 copies of this card from your hand or Library.
Atlantis Pirate
Water-Element Creature
120 Power
120 Stamina
This card gains 30 Power for each <<Atlantis Pirate>> you control. If this card is called, you can search your Library for 1 <<Atlantis Pirate>>.
Atlantis Porpoise
Water-Element Creature
90 Power
100 Stamina
If this card is called, you can search your Library for 1 <<Atlantis Porpoise>>. If a Water-Element Creature you cotnrol is defeated, you can specifically call this card from your hand, also specifically call 1 <<Atlantis Porpoise>> from your hand. You can only use each effect of <<Atlantis Porpoise>> once this turn.
Aqueous Treader
Water-Element Creature
240 Power
240 Stamina
Cannot be called, except by controlling 2 or more Water-Element Creatures that share a name. Once during this turn, you can choose 1 Water-Element Creature and 1 Creature your opponent controls, and remove them from play. You can only control 1 <<Aqueous Treader>>.
Mindscreech
Water-Element Creature
110 Power
120 Stamina
This card gains 40 Power for each <<Mindscreech>> you control. If this card is called in Battle Mode, you can specifically call 1 <<Mindscreech>> from your Library in Save Mode.
Erudition of the Atlantis
Action Card
Discard 1 card, then search your Library for 2 Water-Element Creatures with the same name. You can only use 1 <<Erudition of the Atlantis>> once this turn.
Summoner’s Depths
Action Card
Choose 2 Water-Element Creatures with the same name in your Drop Zone, and specifically call them. You can only use 1 <<Summoner’s Depths>> once this turn.
Atlantis' Insight
Action Card
Choose 1 <<Aqueous Treader>> you control. While this card is in the Drop Zone and that Creature defeats an opponent's Creature, your opponent loses 2 Life instead.
Vaporkin
Reaction Card
Sacrifice 1 Water-Element Creature from your Creature Zone or hand (the card in your hand must have 130 or less Power or Stamina) to activate this card. Specifically call 2 Water-Element Creatures that share a name with the sacrificed Creature from your Library. You can only use 1 <<Vaporkin>> once this turn.
And one of Dorothy Rose's cards:
Reincarnation Flame Beast, Yanma
Fire-Element Creature
100 Power
60 Stamina
If this card is called, you can specifically call 1 <<Reincarnation Flame Beast>> Creature from your Drop Zone in Save Mode, except <<Reincarnation Flame Beast, Yanma>>.