Casting so many spells may seem like a lot but youll quickly realize how easy it is if you take a look at the cards youre playing
After signing up, youll create an online store with a listing for each card you have available

Explorers of the Deep Commander (1) Creature (37) Benthic Biomancer Coralhelm Commander Deeproot Elite Kiora's Follower Master of the Pearl Trident Merfolk Mistbinder Merfolk Skydiver Metallic Mimic Nicanzil, Current Conductor Stonybrook Banneret Thieving Skydiver Cold-Eyed Selkie Emperor Mihail II Evolution Sage Kopala, Warden of Waves Kumena, Tyrant of Orazca Merfolk Cave-Diver Merfolk Sovereign Merrow Reejerey Realmwalker Sage of Fables Singer of Swift Rivers Svyelun of Sea and Sky Thassa, God of the Sea Topography Tracker Vorel of the Hull Clade Deeproot Historian Herald of Secret Streams Seafloor Oracle Surgespanner Tributary Instructor Zegana, Utopian Speaker Mist Dancer Tatyova, Benthic Druid Prime Speaker Zegana Xolatoyac, the Smiling Flood Tishana, Voice of Thunder Instant (9) Rapid Hybridization Growth Spiral Ripples of Potential Beast Within Inspiring Call Quandrix Command Aetherize Ruinous Intrusion Commit / Memory Sorcery (6) Bygone Marvels Curse of the Swine Explore Kodama's Reach Ravenform Wave Goodbye Enchantment (6) Hardened Scales Simic Ascendancy Branching Evolution Deeproot Waters Kindred Discovery Reflections of Littjara Artifact (5) Sol Ring Arcane Signet Simic Signet Swiftfoot Boots Commander's Sphere Land (36) Alchemist's Refuge Command Tower Forest x7 Hinterland Harbor Island x13 Karn's Bastion Llanowar Reborn Mosswort Bridge Myriad Landscape Path of Ancestry Reliquary Tower Rogue's Passage Secluded Courtyard Simic Growth Chamber Temple of Mystery Temple of the False God Unclaimed Territory Vineglimmer Snarl Commander, Theme, and Strategy Merfolk lovers sound off

Magic has had what are called "modal double-faced cards" before that allow you to cast either side from your hand, but this is the first I know of that also allows you to pay a cost to flip it while the front side is already in play - in this case, you can play Peter Parker for two mana, and then pay four more on a later turn to have him transform
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#23 Well, I used to play it, and I can confirm that it creates the exact same experience in cube