Oko is just value by itself
Along with the set information, product images of Shining Fates also have been revealed
The full texts of these abilities are "At the beginning of the monarch's end step, that player draws a card" and "Whenever a creature deals combat damage to the monarch, its controller becomes the monarch." If the triggered ability that causes the monarch to draw a card goes on the stack and a different player becomes the monarch before that ability resolves, the first player will still draw the card
Oh, and he also makes for a neat Commander deck
Like most Pokmon cards, the value of Team Rocket's Mewtwo ex 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 (Ascended Heroes)
Close the lid and wait around 30 minutes to check how the card shapes