While I dont think it's a good card, it just fits so well
Arcade Gannon Cult Healer Doc Samson, Super Psychiatrist Doctor Jane Foster Doctor Strange, Surgeon Donald Blake, Guise of Thor Moonstone, Harsh Mistress Night Nurse, Healer of Heroes The Eighth Doctor The Eleventh Doctor The Fifth Doctor The First Doctor The Fourth Doctor The Fugitive Doctor The Ninth Doctor The Second Doctor The Seventh Doctor The Sixth Doctor The Tenth Doctor The Third Doctor The Thirteenth Doctor The Twelfth Doctor The War Doctor
On the positive side, activating Transmute isn't the same as casting a spell, which means Counterspell variants cannot stop Transmute
Nothing like mass removal insurance with upside
In addition to Hall of the Storm Giants, Crawling Barrens, the sixth man-land in Standard could see play in control strategies, as it benefits from decks with lots of mana at their disposal in the late game