This is absurdly powerful in modern Magic when enchantments include a bunch of creatures, auras, and even sagas
If you do have a deck that can easily hold back five mana each turn, then chances are you're already in a winning position and are much better off dumping all that mana into a big X spell like Genesis Wave or some haymaker like Expropriate
Angel of Destiny Approach My Molten Realm Armament of Nyx Aven Sunstriker Battle Mastery Black Panther, Hope Enduring Bonescythe Sliver Boros Keyrune Bushi Tenderfoot Bushi Tenderfoot Celestial Mantle Choose Your Weapon Disciplined Duelist Drogskol Reaver Dual Doomsuits Favored of Iroas Fencing Ace Fireshrieker Ghostblade Eidolon Goblin Charbelcher Holy Avenger Inquisitor's Flail Jawbone Duelist Kor Duelist Leonardo, Worldly Warrior Lyzolda, the Blood Witch Avatar Mishra Moonmist Mossborn Hydra Phalanx Formation Rahilda, Feral Outlaw Rasaad yn Bashir Siege Striker Skyhunter Skirmisher Skyspear Cavalry Squall, SeeD Mercenary Stronghold Furnace Sunhome, Fortress of the Legion Sword of Hours Twinblade Blessing Twinblade Paladin Wolverine, Claws Out
While Wildcards are a great feature to prevent players from needing to open packs, theyre not perfect
It has a resilient, straightforward game plan and is packed with valuable cards