You can cast a spell using harmonize even if it was somehow put into your graveyard without having been cast

Doran Toughness Matters Doran, the Siege Tower | Illustration by Rob Alexander Commander (1) Planeswalker (1) Creatures (29) Abzan Beastmaster Arasta of the Endless Web Arbor Adherent Avacyn's Pilgrim Baldin, Century Herdmaster Bedrock Tortoise Bosk Banneret Catapult Fodder Colfenor, the Last Yew Faeburrow Elder Doran, Besieged by Time Gorm the Great Heartwood Storyteller Ikra Shidiqi, the Usurper Llanowar Elves Nemata, Primeval Warden Nyx-Fleece Ram Rasaad yn Bashir Runic Armasaur Sapling of Colfenor Sidar Kondo of Jamuraa Skinshifter Soulless Jailer South Wind Avatar Towering Titan Treefolk Harbinger Ulvenwald Observer Wall of Blossoms Wall of Omens Instants (10) Abrupt Decay Collective Resistance Despark March of Otherworldly Light Mythos of Nethroi Nature's Claim Path to Exile Shape the Sands Swords to Plowshares Tear Asunder Sorceries (10) Cultivate Expel the Interlopers Farseek Fell the Mighty Kodama's Reach Nature's Lore Prismatic Ending The Battle of Bywater Vindicate Zero Point Ballad Enchantments (3) Assault Formation Assemble the Players Jaws of Defeat Artifacts (8) Abzan Monument Arcane Signet Fellwar Stone Golgari Signet Orzhov Signet Selesnya Signet Sol Ring Swiftfoot Boots Lands (37) Access Tunnel Ash Barrens Bojuka Bog Brushland Canopy Vista Caves of Koilos Command Tower Evolving Wilds Forest x5 Fortified Village Golgari Rot Farm Haunted Mire Isolated Chapel Llanowar Wastes Murmuring Bosk Plains x3 Radiant Grove Sandsteppe Citadel Scattered Groves Sungrass Prairie Sunlit Marsh Sunpetal Grove Swamp x2 Tainted Field Tainted Wood Temple of Malady Temple of Plenty Temple of Silence Vault of the Archangel Woodland Cemetery Doran, the Siege Tower may be an elderly treefolk, but this deck is anything but slow

Charizard & Braixen GX will be included in the upcoming July set SM11a Remix Bout
Arna Kennerd, Skycaptain Marcy: I mean, frankly, I'm discarding a card all day to kill this immediately every time, no questions asked
I do not care if you want them for a kitchen table game or what