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This can easily lead to more dead hands than normal as Apex Avian is only good in a hand that already has complete scales

Ive included what I believe are some of the top cards available as part of this expansion

You can still transition into a more controlling deck with Cataclysmic Gearhulk and Planar Outburst as sweepers and Tireless Tracker drawing cards, but I expect Kaladesh Standard to be quite fast, so that plan is likely reserved for aggressive Humans decks and things like red aggro

Rules tell us that normally players are only allowed to do it during the main phase of their turn and if the stack is empty (CR 307.1)