You should be able to build your deck to maximize the turtle without compromising it to settle for creatures that aren't playable
Well, the downside is that if you want to master it, it starts demanding cards like Candelabra of Tawnos (which roughly increases mana from lands by 1.5x), so the hurdle is high
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To avoid scams when selling graded Pokmon cards locally, always meet in a public location and verify the buyers identity and payment method before handing over the card
This of course plays into Gideons second ability which allows him to destroy tapped creatures
