Even in your average deck, you should be able to get it down to five or six
Play an enchantment, draw a card, play the next one
Kraum, Ludevics Opus A flying threat that punishes spell-heavy tables while generating steady card advantage
Although Marvel doesn't inherently do anything when it enters play without some setup, at four mana, players could take their time over the first few turns accumulating Energy counters with Attune with Aether, Woodweaver's Puzzleknot, and Aether Hub, so Marvel could eventually be activated on the same turn it's played for a potential combo win
Arctic Foxes Clockwork Fox Devilthorn Fox Etched Familiar Farfinder Ferocious Werefox Filigree Familiar Flutterfox Golden-Tail Disciple Kitsune Ace Kitsune Blademaster Kitsune Bonesetter Kitsune Dawnblade Kitsune Diviner Kitsune Healer Kitsune Loreweaver Kitsune Riftwalker Mothrider Patrol Nine-Tail White Fox Pious Kitsune Seven-Tail Mentor Silverchase Fox Silverstorm Samurai Split-Tail Miko Vulpikeet Vulpine Goliath