Before the ban, it's price had been steadily declining from ~20 USD to around ~10 USD, but when the ban hit, it began to rapidly drop in price
The value of Pokemon GX cards can vary widely depending on factors such as rarity, condition, demand, and the specific card in question
You can add this blue creature in many wizard typal decks, too
I think I would generally rather have a bit of a warrior focus and play Najeela, the Blade-Blossom over this
Liesa, Forgotten Archangel is another controlling piece, one that could easily make this list, were it written a little later down the line
(You cant be the target of spells or abilities your opponents control.) Prevent all noncombat damage that would be dealt to other creatures you control