The following is a mess of high cmc cards that I think are sweet to cast and it's most certainly not a complete list: Nezahal, Primal Tide, Jin-Gitaxias, Core Augur, Myojin of Seeing Winds, Kozilek, Butcher of Truth, Kozilek, the Great Distortion, Cruel Ultimatum, Enter the Infinite, Baleful Force, Maelstrom Wandeer, Time Stretch Card Draw: Chancellor of the Annex, Void Winnower, Iona, Shield of Emeria, Decree of Silence Denial: Archetype of Endurance, Avacyn, Angel of Hope, Sandwurm Convergence Protection: Oblivion Sower, Vorinclex, Voice of Hunger, Myojin of Life's Web, Zendikar Resurgent, Omniscience Ramp: Angel of the Dire Hour, Luminate Primordial, Ashen Rider, Magmatic Force, Myojin of Cleansing Fire, Myojin of Night's Reach, Terastodon, Tidespout Tyrant, Zacama, Primal Calamity, Dread Cacodemon, Myojin of Infinite Rage, Ulamog, the Ceaseless Hunger, Pathrazer of Ulamog, Ulamog, the Infinite Gyre, Nicol Bolas, God-Pharaoh, Nicol Bolas, Planeswalker, Ugin, the Spirit Dragon, Akroma's Vengeance, Violent Ultimatum, Decree of Pain, In Garruk's Wake, Plague Wind, Curse of the Cabal Removal: Sheoldred, Whispering One, Artisan of Kozilek, Praetor's Counsel Recursion: Diluvian Primordial, Sepulchral Primordial, It That Betrays, Emrakul, the Promised End, Blatant Thievery, Worst Fears, Expropriate, Rise of the Dark Realms, Insurrection Theft: Iname as One, Conflux Tutors: Blightsteel Colossus, Storm Herd Beatdown: Or if you prefer seeing a list with all the cmcs and prices: As you can see, we've got a ton of powerful high cmc spells to cheat out

Two heart-wrenching scenes, both centered on the lengths to which someone is willing to go to protect whats important to them
Cards with known print quality issues are often strong targets because a high-grade copy is legitimately rare and collectors know it
Simply narrowing down the Zombies in your deck to a winning combination can guarantee the right hits