The harmonize cost is steep, but your own scaling creatures make it easier to cast from your graveyard
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Decklist: Norin the Wary in EDH Norin, Swift Survivalist | Illustration by Yigit Koroglu Commander (1) Planeswalkers (2) Jaya, Venerated Firemage Tibalt, Rakish Instigator Creatures (19) Birgi, God of Storytelling Burnished Hart Grinning Ignus Hamletback Goliath Hanweir Garrison Iron Myr Kari Zev, Skyship Raider Lightning Berserker Loyal Apprentice Mogg War Marshal Myr Battlesphere Purphoros, God of the Forge Reinforced Ronin Rose Room Treasurer Seasoned Pyromancer Solemn Simulacrum Terror of the Peaks Torbran, Thane of Red Fell Witty Roastmaster Instants (7) Abrade Chef's Kiss Lightning Bolt Mages' Contest Pyroblast Seething Song Thrill of Possibility Sorceries (6) Dragon Fodder Faithless Looting Firecat Blitz Glimpse of Tomorrow Mizzium Mortars Warp World Enchantments (18) Confusion in the Ranks Daring Piracy Dictate of the Twin Gods Fiery Emancipation Furnace of Rath Goblin Assault Impact Tremors Mechanized Warfare Mirror March Outpost Siege Pandemonium Possibility Storm Pyrohemia Spellshock Stensia Uprising Sulfuric Vortex Tectonic Reformation Warstorm Surge Artifacts (11) Arcane Signet Caged Sun Conjurer's Closet Genesis Chamber Honor-Worn Shaku Lightning Greaves Panharmonicon Skullclamp Sol Ring Tome of Legends Wayfarer's Bauble Lands (36) Den of the Bugbear Dwarven Mine Forgotten Cave Kher Keep Mountain x30 Valakut, the Molten Pinnacle War Room The flavor text on Norin the Wary is a running joke in Star Wars movies in that every movie has it

Unlike bestow or meld or any of the past attempts at such a mechanic, the templating of mutate leaves plenty of room to access the effect differently
But I like Dyadrine, Synthesis Amalgam