In terms of price, Cavern of Souls goes for around $50 at the low-end of sales, but the card is starting to uptick towards $65 in both versions
Almost anything that wants artifact recursion can work with Toph and it's positioned to move up a bracket with Crop Rotation and The One Ring, but it is also comfortable to make lands matter and dominate
[2D] Max Darkness (160) When you play this Pokemon from your hand to evolve 1 of your Pokemon during your turn, you may switch 1 of your opponent's Benched Pokemon with their Active Pokemon
I've always been a lover of planeswalkers and Kaya the Inexorable will be a welcomed addition to Commander
Gaining life and growing all your durdles is a pretty disgusting effect to tack onto a not-completely-horrendous evasive body, and since it triggers on ALL life gain, its inherent synergies are pretty absurd
The only difference is thickness and weight due to the Pokmon cards tri-layer cardstock construction