You can only use each of the following effects of "Stand Up Centur-Ion!" once per turn
A GameStop is not a community space, and it's ridiculous to think there will be any trading and playing going on this Saturday
Any changes can be made to the Deck between Duels of a Match, including the following: Adding Cards Subtracting Cards The Deck must be legal for play (appropriate number of cards in the Main and Side Deck, complies with the Forbidden and Limited list available within the MASTER DUEL app)
Basic Pokemon cards are the base evolution form, most common cards in Pokemon Trading Card Game Pocket (PTCG Pocket)
Counterspell simply trades one for one with a card of theirs, it will not draw you into your important cards nor deny them draws
The Mycotyrant If Im going to list a fungus that can be your commander ( The Last of Us Secret Lair when?), I may as well go with The Mycotyrant