Outside the Commander realm, it's been a decent sideboard card in blue-white control decks in both Pioneer and Historic
Sorcery speed is what ultimately kills this card for most environments, but a Trumpet Blast of sorts paired with a draw four can give aggressive decks a lot of staying power, and this is a solid curve-topper for a token strategy
Cards from SOI (or whatever the most recent set is) are usually great examples of how skewed the TCG high price can be, simply due to the drastic price decrease most cards experience over a short period of time
Marcy: I'm not particularly a huge fan of Dr
Monoist Sentry Good amount of 4 power matters options out there like Worldwagon and Outcaster Trailblazer
I know it seems like this section is directly counter to my last one, where I said that Ultimate Masters will hold its value well, but I hope you can see how both things can be true at the same time