Obsidian Flames has two Charizard ex variants but neither breaks 80, reflecting market saturation for the lizard in this particular set
The bounce package is built around Merlin, Shapeshifter and Madam Mim, Snake, providing value every time you return a card to your hand
Once you've opened enough cards, the vault will become available to open , and it grants one mythic rare, two rare, and three uncommon wildcards
At first, the large supply of these cards makes their value low, but over time they can grow more valuable
You could then replace draw-discard effects with more "pure" card draw options like Treasure Cruise (if you have a lot of cards in your graveyard), Quick Study or flexible draw like Flame of Anor
For the most part, things look fairly reasonable, which may mean a minimal impact on the likes of Modern or Pioneer