You cant say for certain how much any given card impacts your opponents
Something about a creature that turned into a Millstone seemed very cool to me

Aboleth Spawn Abstruse Archaic Adric, Mathematical Genius Ancient Greenwarden Annie Joins Up Annie Joins Up Bifur, Melodic Rider Brokers Confluence Chief of the Wilds Clara Oswald Cloud, Midgar Mercenary Consign to Memory Defabricate Delney, Streetwise Lookout Deny the Witch Detect Intrusion Disallow Drivnod, Carnage Dominus Echo, Perceptive Prodigy Echoes of Eternity Elesh Norn, Mother of Machines Emerald Dragon Emerald Dragon Ertai Resurrected Felix Five-Boots Firebender Ascension Gandalf the White Gogo, Master of Mimicry Green Slime Harmonic Prodigy Isshin, Two Heavens as One Isshin, Two Heavens as One Katara, the Fearless Kirol, Attentive First-Year Krang, the All-Powerful Lithoform Engine Louisoix's Sacrifice Mirror Room // Fractured Realm Mirror Room // Fractured Realm Mister Fantastic Naban, Dean of Iteration Nimble Obstructionist Overcharged Amalgam Panharmonicon Panoptic Projektor Peter Parker's Camera Phenomena Recorder Repudiate // Replicate Repudiate // Replicate Return the Favor Roaming Throne Roaming Throne Sanctum of All Scientist Supreme of A.I.M

Here was what Tsuyoshi submitted: Unluckyman's Paradise Land If Unluckyman's Paradise is in your opening hand and you're not playing first, you may begin the game with it in play