Like most Pokmon cards, the value of Mewtwo-GX depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Hidden Fates Shiny Vault)
Shadows of Brimstone: Executioners of Valitore Enemy Pack
If youre targeting specific cards for your deck or collection, singles are a great option for you
What makes the card so effective is the colorful use of felt in the backdrop to make Tynamo appear as though its swimming under the water
What makes the artwork exceptional is the contrast between scale and normalcy
The third and final Battle Pack, Battle Pack 3: monster League, was released on July 25, 2014