As of now, though, the most expensive Doctor Who card is this, at $1500
As I explained in my article "Metamorphosis 2.0," it wasn't until we took core sets away that we realized how much we'd relied on them for certain things: fitting in reprints that were world-specific, making cards to mechanically support themes in Standard or set up things that will eventually be relevant, helping players avoid fatigue as the core set is opt in, and most importantly, helping ramp new players into the game
The Enchanted version of Mickey Mouse, Wayward Sorcerer sells for around $246
May contain these cards: ECL 1351
At its baseline, it's strong but not impressive when you compare it to the rest of your options
To get to your big blue sphinxes faster Grand Arbiter Augustin IV is a salty way, but rightfully so, Misleading Signpost does impressive redirecting work and sticks around as a good blue mana rock, and Midnight Clock does the same, except sing a bibbity-bobbity-boo and it gives you a bunch of fresh cards, thankfully it does not specify Enchanted Carriage
