The graph would look something like a bell curve, which is where the term "mana curve" comes from
Help me, he said
Your threats vary widely in utility between matchups Xathrid Necromancer is fearsome against Esper but useless against Mono-Blue whereas Agent of the Fates is a Trained Armodon against control and a wrecking ball against creature decks, and with Disciple you can transmute one for the other
Bilbo, Birthday Celebrant 6
Each one of the cards below have a similar foil version you can find in packs from The First Chapter

Exactly one planeswalker Several of the more recently printed suspend spells, like Crashing Footfalls Proliferate payoffs for the various +1/+1 counter, vanishing and Thallid cards, like Inexorable Tide, Contagion Clasp, Karns Bastion or particularly Yawgmoth, Thran Physician Ninjas to assist the small evasive creatures in blue and black, especially Ninja of the Deep Hours, Fallen Shinobi and Yuriko, the Tigers Shadow Waste Not Force of Negation (and possibly others from that cycle) Griselbrand, Elesh Norn and/or Emrakul, the Aeons Torn Kaya, Ghost Assassin (okay, maybe TWO planeswalkers) Nicol Bolas, the Ravager (doesnt count as three!) Delver of Secrets Golos, Tireless Pilgrim At least one Saga Fatal Push and Assassins Trophy (since weve already seen Path to Exile) Thalia, Guardian of Thraben Mystic Sanctuary Enduring Ideal Monastery Swiftspear Terminus or Supreme Verdict Can you imagine those cards printed in the old-fashioned style