My personal favorite is the Island which, because Im old, reminds me of when Jaws pops out of the water on the Universal Studios tour
After all, many people want to earn as much money as possible after finding an old box with cards, isnt it
Vivien, Monsters Advocate gives us a way to play cards from the top of our deck, meaning we can use the mana as long as the top of our deck has creatures on top of it
It wasn't beloved, but it wasn't as troublesome as the hybrid costs had been in Alara Reborn , so I expect us to do it again, but not frequently

Approach of the Second Sun As Luck Would Have It Azor's Elocutors Barren Glory Battle of Wits Biovisionary Call the Spirit Dragons Central Elevator // Promising Stairs Central Elevator // Promising Stairs Chance Encounter Coalition Victory Darksteel Reactor Doctor Doom, Unrivaled Duelists' Convocation International (playtest) Epic Struggle Felidar Sovereign Form of the Approach of the Second Sun Gallifrey Stands Halo Fountain Happily Ever After Hedron Alignment Helix Pinnacle Hellkite Tyrant Jace, Wielder of Mysteries Laboratory Maniac Laboratory Maniac Liliana's Contract Luck Bobblehead Mayael's Aria Maze's End Mechanized Production Mortal Combat Near-Death Experience Now I Know My ABC's Ramses, Assassin Lord Revel in Riches Shinryu, Transcendent Rival Simic Ascendancy Test of Endurance Thassa's Oracle The Cheese Stands Alone Triskaidekaphile Twenty-Toed Toad Wowzer, the Aspirational (playtest)