From Cromat to whatever the new five color legend will be in the Lorwyn Eclipsed precon, there is a decent history of legendary design and five color design in general
Its also just a generically good card in casual Commander, so theres demand there too
The six puzzles, all inspired by a different ink color (Amber, Amethyst, Emerald, Ruby, Sapphire, and Steel), showcase Glimmers reimagined Disney characters infused with the magical qualities of the ink they represent
My only real gripe would be if these digital-exclusive cards start driving a wedge between digital and paper play of formats like Standard or Modern
As a Timmy Magic player, many of these Summons feel as if they were printed explicitly for me