The Tyranitar GX (223 / 214) card can be found in the Lost Thunder set.
Recently sold 13 times and based on those sales is worth around £24.23.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £16.78 to £31.68, making it quite stable.
This Rare Rainbow card was illustrated by 5ban Graphics.
The fact that it is a GX card makes it one of the more valuable cards.