While each battleground card represents a different difficulty level (four levels from Easy to Extreme) just like Deep Trouble, I found Palace Heist to be a lot more balanced and manageable than Ursulas game, even when using the included preconstructed decks
Though there are ways to guarantee getting hold of certain cards in products such as Starter Decks, for example, which are pre-constructed and always have the same selection of cards but for the most part, players will be at the whim of chance when opening a booster pack
PGR Premium Gold Rare Black Rose Dragon X FIRE Level 7 [ DragonSynchroEffect ] ATK 2400 DEF 1800 1 Tuner + 1+ non-Tuners When this card is Synchro Summoned: You can destroy all cards on the field
Last of the one-ofs is Kheru Spellsnatcher, which I fully expect to be a Commander staple, but I think could be quite decent in Standard too
For this reason, multi-type decks can be tricky
You get a decent enough one mana 1/1 Flyer, and then some additional value on top of that