Water

"Water" ( Mizu) is an attribute.

List of Sets with Water Cards

 * Booster Set 2: Cyber Ninja Squad
 * Booster Set 4: Darkness Fable
 * Booster Set 5: Break to the Future
 * Extra Booster 1: Immortal Entities
 * Perfect Pack 1: Golden Buddy Pack (ver.E)
 * Special Series 1: Super Strong!! Buddy Rare Double Deck

Ancient World

 * Blizzard Left Bruder
 * Ice Dragon Emperor, Glacies
 * Ice Dragon, Knoke-isle
 * Ice Fairy Dragon, Garbolette

Darkness Dragon World

 * Black Dragon, Cold Blade

Dungeon World

 * Third Omni Water Lord, Miseria

Generic

 * Buddy Help

Items

 * Water Slash Sword, Murasame

Monsters

 * Cat Shadow, Aoihime
 * Crazed Surging Waves, Makaizou
 * Disperser of Conflagration, Shiromizuchi
 * Fang Style Ninja, Kibashachi
 * Loud Laugh Ninja, Fugumaru
 * Mobile Ninja, Jiraiya
 * Moss Wall, Fudogame
 * Perfect Beauty, Hyoshi Shirasagi
 * Runaway Female Ninja, Yukishiro
 * Sea-splitting Irukamaru
 * Stealth Ninja, Kirikakure Saizo
 * Steel Wall, Beheading Crab
 * White Dragon Hermit, Nanase
 * Yumi Ninja, Suiha

Spells

 * Demon Way, Kiribusuma
 * Demon Way, Noroihikagami
 * Water Technique, Shinotsukuame
 * Water Technique, Minawagakushi

Legend World

 * Frost Giant, Hrimthurs
 * Frost Wall, Nevel Vans
 * Ice Blade "Astralkus"
 * Ice Blade, Joker
 * Ice Emperor, Thrudgelmir

List of Support Cards

 * Water Technique, Shinotsukuame
 * White Dragon Hermit, Nanase