Three direct damage to the face is also expensive for six mana, but guaranteeing those last three points of damage to close the game at any point is worth the cost
Lets start with the most flavorful additions to the deck Norman Osborn and Green Goblin, Nemesis
Every time something returns from a graveyard, your board grows bigger to overwhelm opponents quickly with both value and power
The Forgotten Realms set wasnt enough
While Mew EX excels at OHKOing EX cards like Charizard and Mewtwo, others like Pikachu, Arcanine, and the Kanto Legendary Bird trio are better dealt with Mewtwo EX
Just keep in mind that while in theory, foil mythics and rares add to the expected value of the set, your odds of actually opening a valuable foil in any specific box is pretty low, since they are quite rare