mtg cards like generous gift Card Destroy target permanent Generous Gift (Retro Frame) -

6: Exile the top seven cards of your library

Disney has had a lot of failures in the game space, and even though this is very different in nature from something like Disney Infinity, the outcome could have been the same

As a quick related aside, theres a common anti-Reserved List argument that most of these cards will hold their value even though a reprint because even if they print more Underground Seas, they arent going to print any more Beta Underground Seas

For more detailed information about the venture into the dungeon keyword action and previously printed dungeon cards, please check out the Adventures in the Forgotten Realms Mechanics article