While most precons come with the necessary Sol Ring and Arcane Signet, plus a handful of slower mana rocks, they wont hold their own against any deck running Ancient Tomb, Grim Monolith, and many more of the game changers that infrequently come from precons
Sometimes its as simple as playing a card like Legion Warboss in the sideboard of Jeskai SuperFriends
If you look into the brown center area you can see something I call clouding, it is much more visible on old backs
Note: Attractions aren't played in your main decks, and they don't have normal Magic backs
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Bladegriff Prototype isn't bad, but its effect doesn't always help you as much as it helps others, and once a multiplayer game is down to two players, it's basically just your opponent sacrificing permanents, which might not be that impactful in the late game