For people my age and younger, the stock market is kind of boring
The Gitrog Monster is quick, resilient, and has really high card quality
If you want to be a little bit stealthy to prevent anyone from metagaming against you, Karona, False God is a fine choice that is particularly good in a tribal deck
She is a planeswalker, however, which are inherently weaker in a multiplayer format because you have to defend her from not just 1 but 3+ possible attackers, so I'd avoid running her in most decks
If your active Pokmon is knocked out or you retreat it, move a different Pokmon from your bench to the active spot
Theres a more consistent level of quality in Magics art these days, but there are still some outstanding (derogatory) ones here and there