In fact, a few of these rules of thumb may not work well together, or are outright contradictory
While every set seeks to bring something newas that's the point of adding themsome have offered more unique options than others
What sleeve does PSA prefer
We know the first two sets of meld cards, and what they meld into: Urza, Lord Protector and The Mightstone and Weakstone combine into Urza, Planeswalker, showing the moment of Urzas spark igniting in the wake of the activation of the Golgothian Sylex
Replace all of these with four copies of Scalding Tarn and basic lands
When cards cause so much gameplay anxiety that you must make special note of whether they've been played or not in every single duel, that's a good indication that they are horribly broken