This cube is designed to be as powerful as possible while following two restrictions. The first is that the total cost should stay under 450$ at the time of building, the second is that it should be designed for quick play. Quick play is a set of rules I designed in order to make gameplay move along faster and it consists of four rules.
no searching any libraries at any time
no mechanics that require external tracking or are easy to forget(enter the dungeon, initiative, monarch, day and night, secret choices, voting etc.) That take extra time or require extensive tracking
no double faced cards of any kind
no counters on players(experience, energy, poison, etc)
These four rules speed up gameplay considerably and drastically reduce the complexity of gameplay. To this end cards like questing beast that have a lot of text that some players have difficulty remembering have been excluded but it is not a rule to do so.