yugioh nekroz cards of Trishula - Battles of Legend: Monster Mayhem 1400 You can Ritual Summon this card with any Nekroz Ritual Spell Yu-Gi-Oh! Wiki - Ariel, Priestess

You can find some great sellers who piece together well though-out mystery boxes on eBay

It looks like youre right that it is only EX Power Keepers, for some reason I thought the set consisted of a mix of cards from other sets

9 The Glass Slipper Card 208/204 EN.7, Amber Ink Perhaps the most well-known piece of footwear in the Disney universe, if not the world, Cinderella may have lost her glass slipper, but now Disney Lorcana players can use the shoe to bring a Princess character into the player's hand

110/110 Potion

Removal Prismatic Ending, Wrenn and Six, and Teferi, Time Raveler make up the removal suite

Alexios, Deimos of Kosmos The mono-red Alexios, Deimos of Kosmos has an ability similar to cards like Xantcha, Sleeper Agent