| intro = This search category entry details every card that [[Set]]s cards from your [[deck]] to your opponent's [[field]].
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The '''Ocean''' or '''Sea''' field was shown briefly in [[Duelist Kingdom]], used by [[Mako Tsunami]]. It powered up [[WATER]] monsters as well as hiding them under the water. Other monsters could not occupy it.
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| query = [[Actions::Sets from your deck to your opponent's field]]
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In early video games the field can be changed to Ocean, by activating "[[Umi]]", which granted the [[ATK]] and [[DEF]] changing effects of "[[Umi]]" to the affected area.