Non-Creature Taxers Glowrider and Vryn Wingmare are near-clones that tax non-creature spells, slowing down control, combo, and ramp decks
I can see this popping up in the removal suite of decks in multiple formats
the real power comes when you are generating more Treasure tokens than what it costs to trigger the ability and then recast Dockside Extortionists
printPkmn("Iron Hands", "HP 154");printPkmn("Dondozo", "HP 150");printPkmn("Clodsire", "HP 130");printPkmn("Dudunsparce", "HP 125");printPkmn("Farigiraf", "HP 120");printPkmn("Great Tusk", "HP 115");printPkmn("Scream Tail", "HP 115");printPkmn("Baxcalibur", "HP 115");printPkmn("Ting-Lu", "HP 115");printPkmn("Brute Bonnet", "HP 111")
Unlocking all of the Promo-A cards is proving difficult but this Mewtwo one is taking the biscuit
Both can do plain untargetable but green also gets "untargetable by opponents' spells and abilities" while blue gets activated untargetable and auras that grant it