In terms of collector value, the most valuable single card would be the Pikachu Illustrator
The new Gisa is amazing since she'll make two 2/2 tapped Rogue Zombies that get +1/+1 and menace from her static ability, when you commit that crime
For example, if your opponent has no Counter cards in hand and only one Life Card remaining, begin with a 5,000 Power attack, then follow with a 7,000 Power attack
Cards like Stifle or Disallow cant counter morph since its not an activated or triggered ability, though they can usually target the abilities that trigger when a creature is turned face-up
For example, Inferno Fire Blast has "activatre" instead of "activate" in its text and Humanoid Worm Drake has "Worm Ddrake" as a fusion component monster instead of "Worm Drake"
Over the past few months, I noticed they started listing cards as damaged because they had a signature written on them that wasnt from the artist