Many players grew up on playground decks beat up piles of cards that have only ever touched asphalt, sticky fingers and the inside of a lunch bag
Thankfully, even if Wizards of the Coast wont create any more Cephalid MTG cards, they can still make Cephalids in spirit
This deck runs a full playset of the Elder Dragon, so it's easy enough to draw another copy or to bring back one from the graveyard with either Liliana, Death's Majesty or The Scarab God

Aboroth Adarkar Unicorn Ancestral Knowledge Arctic Nishoba Arctic Wolves Arnjlot's Ascent Balduvian Fallen Balduvian Shaman Blizzard Braid of Fire Brand of Ill Omen Breath of Dreams Cold Snap Corrosion Cover of Winter Decomposition Dreams of the Dead Dystopia Earthen Goo Elephant Grass Energy Storm Firestorm Hellkite Flow of Maggots Freyalise's Radiance Fyndhorn Pollen Gallowbraid Glacial Chasm Glacial Plating Halls of Mist Heart of Bogardan Heat Wave Herald of Leshrac Hibernation's End Illusionary Forces Illusionary Presence Illusionary Terrain Illusionary Wall Illusions of Grandeur Infernal Darkness Inner Sanctum Juju Bubble Jtun Grunt Jtun Owl Keeper Karplusan Minotaur Kjeldoran Javelineer Krovikan Whispers Maddening Wind Magmatic Core Malignant Growth Mana Chains Mesmeric Trance Mind Harness Morinfen Musician Mwonvuli Ooze Mystic Might Mystic Remora Naked Singularity Old Fogey Phobian Phantasm Phyrexian Etchings Phyrexian Soulgorger Polar Kraken Prismatic Circle Psychic Vortex Reality Twist Revered Unicorn Ritual of Subdual Ronom Hulk Royal Decree Sheltering Ancient Snowfall

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We have to keep our hands off the guilds, but everything else is fair game