Immediately, for three mana you turn what you deem the biggest threats into 0/4 walls, already off to a good start

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

Birds of Paradise Birds of Paradise is easily one of the best sources of early ramp and mana fixing
13 Bubbling Muck Get That Mana Now A slightly limiting card but one with plenty of potential, Bubbling Muck is a one-mana sorcery from Urza's Destiny that can turn a few mana into tons
Skithiryx allows for very aggressive decks that tend to utilize either infect-focused strategies or Voltron strategies that bolster the effectiveness of Skithiryx itself
Put one pile into your hand and the other into your graveyard (Piles can be empty). Both cards will be released as part of Dominaria United , an expansion that launches on September 9