You must choose one Basic Pokmon card to be your Active Pokmon
Its harder to assemble combos in larger cubes and they tend to feature larger swings in power level between cards, but smaller cubes can become stale much more quickly
While the restriction of Golgari-Grave Troll hampers the decks consistency in finding other green cards, the modern adaptation is to include a playset of Shambling Shell, sometimes along with some number of Hogaak, Arisen Necropolis and Noxious Revival
Again, white usually wants to be aggressively stanced, and seven-drop fliers that might slowly gain some card advantage dont mesh well with how I imagine most white decks want to look like
Try to be polite and don't make a scene, especially if it seems like the seller doesn't know that their product is fake
I like it most in decks with expensive commanders that can be made cheaper or ramped out