The same thing I said for the previous card applies for Disciples of the Inferno: This is very much a burn card
The connected commons and uncommons have gone away, and part of making the booster playable included balancing colors, so the new Play Boosters will do that
If you load up on creature spells, then it allowing everyone to draw cards except for a player playing a noncreature spell becomes less of an issue
This makes prowess best used in decks with few creatures but multiple cheap spells that also replace themselves by drawing additional cards
But the table does suggest that you should be leaning more towards the best four performing archetypes (BR Party, BW Clerics, RW Warriors, and UB Rogues) if possible
So, a deal was forged: For each trip, we would get something new to keep us busy