Each new setting introduces new mechanics, and Outlaws of Thunder Junction is no different
So, I give it a high score for synergy and value, but low on something new to the game, and that cracks my top ten, but not highly
Thalia puts a halt on decks like storm combo all by itself, and its a needed feature to survive fast combo formats like Legacy and Vintage
You can find the RW and BG ones first printed in Edge of Eternities Commander Precons, and the UG ones printed in the Lorywn Eclipsed Commander Precons
Abeyance (T1, Ext, S, Block) Almost strictly better than Orim's Chant, as it allows you to draw a card plus shut down another deck on your opponent's turn if need be
Otherwise, they hold mostly sentimental rather than financial value