Typically the decks that best exploit Upheaval involve lots of artifact mana sources and some cheap yet potent threat
Clocks, gears, gems, mechanical flowers
No Refunds
Its especially good when paired with card draw or tutors, letting you stack your deck right before your upkeep for guaranteed value from the Bridge
Space-Time Smackdown Museum 2 Collect full artwork versions of Rotom, Garchomp, Manaphy, Glameow, Spiritomb, Staraptor, Hippopotas, Carnivine, Gastrodon, Cresselia, Giratina and Rhyperior

Without further ado, here are the Most Expensive Cards from Magic: The Gathering Assassins Creed Set so far: #1 Sword of Feast and Famine $22 #2 Excalibur, Sword of Eden $20 #2 Edward Kenway $11 #3 Black Market Connections $9 #4 Sword of Light and Shadow $8 #5 Ezio Auditore da Firenze $6 #6 Altar Ibn-LaAhad $6 #7 Brotherhood Regalia $5 #8 Caduceus, Staff of Hermes $5 #9 Cover of Darkness $5 #10 The Capitoline Triad $4 #11 Desynchronization $4 #12 Kassandra, Eagle Bearer $4 #13 Templar Knight $4 #14 Staff of Eden, Vaults Key $3 #15 Basim Ibn Ishaq $3 #16 Temporal Trespass $3 #17 Mjlnir, Storm Hammer $3 #18 Cleopatra, Exiled Pharaoh $2 #19 Reconnaissance $2 #20 Crystal Skull, Isu Spyglass $2 #21 Eivor, Wolf-Kissed $2 #22 Yggdrasil, Rebirth Engine $2 #23 Leonardo da Vinci $2 #24 Apple of Eden, Isu Relic $2 #25 Propaganda $2 #26 The Spear of Leonidas $1 #27 Bayek of Siwa #28 Overpowering Attack $1 #29 Senu, Keen-Eyed Protector $2 #30 Conspiracy $1 Thats it