With that in mind, this deck has a Kraken, Leviathan, Octopus and Serpent theme, using their high mana cost for a number of effects
This Creatures is cheap, helps you build up Energy counters over the course of the game, then acts a strong Energy sink in the late game
You can only do these things on your turn unless a card specifically states otherwise

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And then, if you run damage wraths
7 Kheru Goldkeeper = Infinite Treasure Standard/Commander/Modern/Pioneer Turns out, Kheru Goldkeeper is one of the stronger cards in Tarkir: Dragonstorm