Light Water Dragon
Level 4 WATER/Sea Serpent Effect1400 ATK / 1300 DEF
(This card is always treated as "Water Dragon".)
You can banish this card you control; Special Summon 3 Level 5 or lower Dinosaur monsters (WATER or WIND) from your Deck in Defense Position (but their effects are negated), also you cannot Special Summon from the Extra Deck for the rest of this turn, except Dinosaur or Sea Serpent monsters. You can only use this effect of "Light Water Dragon" once per turn.
Mythic Water Dragon
Level 8 WATER/Dragon Effect1000 ATK / 2000 DEF
If you control an EARTH monster, you can Special Summon this card (from your hand). You can only Special Summon "Mythic Water Dragon" once per turn this way.
Water Dragon
Level 8 WATER/Sea Serpent Effect2800 ATK / 2600 DEF
Cannot be Normal Summoned/Set. Must be Special Summoned with "Bonding - H2O". The ATK of FIRE monsters and Pyro monsters on the field becomes 0. When this card is destroyed and sent to the GY: You can target 2 "Hydrogeddon" and 1 "Oxygeddon" in your GY; Special Summon them.
Water Dragon Cluster
Level 10 WATER/Sea Serpent Effect2800 ATK / 2600 DEF
Cannot be Normal Summoned/Set. Must be Special Summoned with the effect of a "Bonding" Spell/Trap. If this card is Special Summoned: You can activate this effect; Effect Monsters your opponent currently controls cannot activate their effects for the rest of this turn, also change their ATK to 0 until the end of this turn. (Quick Effect): You can Tribute this card; Special Summon 2 "Water Dragon" from your hand and/or Deck in Defense Position, ignoring their Summoning conditions.