The Doctor Who set introduced a partner-style mechanic where creatures with doctors companion can partner up with any of the doctor-type cards from the set to be your paired commanders
On top of having our own creatures attack for profit, we're going to punish our opponents for doing the same
If that permanent loses its abilities and then would go to a graveyard, it will still be exiled instead
Thats not playable on its own, but maybe theres some sort of Affinity-pod brew that could go deep with Vedalken Engineer or powering Ornithopters into Wurmcoils
(2024-07-26) While a permanent is phased out, it's treated as though it doesn't exist
Some older sets introduced anime frames for staple cards like Brainstorm, Lightning Bolt, or Path to Exile, which can also be hot items among collectors