On the Emerald side, Helga Sinclair strikes me as the most playable, both as an anti-control card and a potential shift target for the new Floodborn Helga, which I adore
So, if you get sick of Mindslaver locking your friends, you have about 22 cards you can make good use of for other decks
Most valuable cards in The List View the full price guide $109.34 Ancient Tomb The List $67.21 Vampiric Tutor The List $65.47 Shadowspear The List $63.32 Anointed Procession The List $59.31 Rhystic Study The List $58.11 Minamo, School at Water's Edge The List $57.28 Nykthos, Shrine to Nyx The List $55.15 Demonic Tutor The List More cards by Jarel Threat $30.20 Norin the Wary // Norin the Wary Secret Lair Drop $21.01 There and Back Again The Lord of the Rings: Tales of Middle-earth $17.75 Inkshield Commander 2021 $16.84 Tyvar the Bellicose March of the Machine: The Aftermath $14.35 Tyvar the Bellicose March of the Machine: The Aftermath $13.58 Inkshield Commander 2021 $13.14 Rest in Peace Mystery Booster 2 $11.61 Inkshield Duskmourn: House of Horror Commander Discover Keep browsing SetThe List Most valuableTop 100 Magic: The Gathering cards You might also like...

The big money cards include Darksteel Plate, Sword of the Animist, Fire-Lit Thicket, and Clever Concealment, with the latter two approaching $20 or more
A good example is Obeka, Splitter of Secondss ability to add extra upkeep steps