Magnificent Mavens · Single card
(This card's name is always treated as "Umi".) All WATER monsters on the field gain 200 ATK/DEF. Reduce the Level of all WATER monsters in both players' hands and on the field by 1.
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12
A Legendary Ocean
Structure Deck: Fury from the Deep
C
A Legendary Ocean
Speed Duel: Streets of Battle City
C
A Legendary Ocean
Speed Duel GX: Midterm Paradox
C
A Legendary Ocean
Retro Pack 2
C
A Legendary Ocean
Realm of the Sea Emperor Structure Deck
C
A Legendary Ocean
Legendary Duelists: Season 1
C
A Legendary Ocean
Legendary Duelists
C
A Legendary Ocean
Legacy of Darkness
C
A Legendary Ocean
Legacy of Darkness
C
A Legendary Ocean
Hobby League 1 participation cards B
CA Legendary Ocean
Dark Beginning 2
C
A Legendary Ocean
Dark Beginning 2
C