Eight is typically too much to pay unless it wins you the game on the spot, and I think Ardyn is just too vulnerable to be as good as the other expensive bombs in this set like Summon: Knights of Round and Summon: Bahamut
Wincons outside of typical black combo pieces, especially the Revel in Riches and Marionette Master pieces to take advantage of those Treasures, are a bit lacking in Mari's supported creature types
The most common of those is weather to use on a low power target to gain immediate tempo or save it to deal with a card that ruins you
Stitch, Rock Star A beloved and valuable Disney Lorcana promo card
Sythis, Harvest's Hand Sythis, Harvest's Hand has access to many of the same enchantment based lock pieces that Zur does, but it plays very differently
Please note that the cards may have slight bubbles on the front