Whether collecting or selling, knowledge is the ultimate asset
If you have a show exclusively with TCG, everyone is going to have the same product at every table
The Doctor Who Commander precons have a lot of cards that support this strategy, like Star Whale and Judoon Enforcers, and you have some suspend classics like Ancestral Vision or Greater Gargadon

The original 1998 Pokemon cards Dark Pokemon theme set First Gold & Silver era set Rare shadowless variants First edition premium cards Modern high-value set Shiny Pokemon collection Fossil #1/62 Fossil #2/62 Fossil #3/62 Fossil #4/62 Fossil #5/62 Fossil #6/62 Fossil #7/62 Fossil #8/62 Fossil #9/62 Fossil #10/62 Fossil #11/62 Fossil #12/62 Fossil #13/62 Fossil #14/62 Fossil #15/62 Fossil #16/62 Fossil #17/62 Fossil #18/62 Fossil #19/62 Fossil #20/62 Fossil #21/62 Fossil #22/62 Fossil #23/62 Fossil #24/62 Fossil #25/62 Fossil #26/62 Fossil #27/62 Fossil #28/62 Fossil #29/62 Fossil #30/62 Fossil #31/62 Fossil #32/62 Fossil #33/62 Fossil #34/62 Fossil #35/62 Fossil #36/62 Fossil #37/62 Fossil #38/62 Fossil #39/62 Fossil #40/62 Fossil #41/62 Fossil #42/62 Fossil #43/62 Fossil #44/62 Fossil #45/62 Fossil #46/62 Fossil #47/62 Fossil #48/62 Fossil #49/62 Fossil #50/62 Fossil #51/62 Fossil #52/62 Fossil #53/62 Fossil #54/62 Fossil #55/62 Fossil #56/62 Fossil #57/62 Fossil #58/62 Fossil #59/62 Fossil #60/62 Fossil #61/62 Fossil #62/62

This mana dork is honestly just sweet, especially if your Commander is a Human, but even more so if your deck has obvious synergies
The Pokmon has 80HP, but more importantly, does 30 damage plus another 20 for every energy attached to your opponent's active Pokmon