Archmage Emeritus is a popular pick in cEDH despite being too slow for faster formats, thanks to how easily it snowballs value in spell-heavy builds
Sure, people laugh when your Staff of the Death Magus hits the board, but when you follow it up with a Demons Horn or Paradise Plume, things stop being so funny
You could then have surprise spells on your opponent's turns, whether that is a blowout sorcery or a sudden blocker
This commander can get absolutely massive over the course of a long game
I kind of take it for granted how ubiquitous equipment is in modern Magic, especially considering the first equipment wasnt introduced until 2003s Mirrodin
Sherlock Holmes and Columbo both get their dues in Murders at Karlov Manor, but the set wouldnt be complete without a nod to Mystery Inc