Endless Punishment is a rare instance of a Commander precon that fully commits to doing one thing
I, personally, have the habit of opening one single Collector Booster per set
The thing that pushes this to a level above cards like Impulse for me is that you can put things back into your deck and that is something not many cards in magic allow for, certainly not in such a cheap and painless way as this (except of course Brainstorm...)
Flynn Rider: Charming Rogue and Cheshire Cat: Not All There offer great lore generation at a low cost while deterring attacks, and Kuzco: Temperamental Emperor and Mad Hatter: Gracious Host double down on both of these regards at a higher cost
Most cards will be unaffected, but cards that have triggered abilities in the upkeep will like Paradox Haze, just as Dark Confidant, will love this thing
And using them may be cheating by some players