The Dark Blastoise (4 / 110) card can be found in the Legendary Collection set.
Recently sold 13 times and based on those sales is worth around £96.71.
Currently, there are 11 open listings for this card on ebay.
This card sells in the range of £17.15 to £176.27, making it highly volatile.
This Rare Holo card was illustrated by Mitsuhiro Arita.