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March of the Machine introduced battles, a new card type we haven't returned to, although I've publicly said it's in at least one set currently in design

Piwraithe the Ghost Pirate X WATER Level 4 [ Aqua / Effect ] ATK 1500 DEF 500 If a face-up WATER monster(s) you control, except "Piwraithe the Ghost Pirate", is destroyed by battle or card effect, while this card is in your GY: You can Special Summon this card (but banish it when it leaves the field), and if you do, it gains 100 ATK for each WATER monster in your GY, until the end of the next turn

Welcome to my list of cards that feel in the oeuvre of the Cthulhu Mythos

You can also consider that lands you control are gates or deserts