The biggest downside here is if an opponent wipes the board, you not only lose your board state, but your draw engine
For instance, despite all five Titans being legal, Elesh Norn was a dominant Standard card on multiple occasions, most memorably in its role of what you can Birthing Pod a Titan or Wurmcoil Engine into. Creatures (28) 1 Llanowar Elves 1 Solemn Simulacrum 4 Birds of Paradise 1 Acidic Slime 1 Inferno Titan 1 Wurmcoil Engine 1 Viridian Emissary 1 Elesh Norn, Grand Cenobite 4 Blade Splicer 1 Fiend Hunter 3 Avacyn's Pilgrim 1 Geist-Honored Monk 4 Strangleroot Geist 4 Huntmaster of the Fells Lands (24) Spells (8) In a format full of haymakers, Elesh Norn was one for the ages, particularly alongside lots of small, dorky creatures like Llanowar Elves and Germ tokens
It takes the decks that are already strong and pushes them just enough to make them format defining
Christopher Robin, Hunny Sage, the redesign's headliner, is a base Legendary rather than an Enchanted print himself
And Sapphire is already excellent at providing that
