This is because, despite many faults in the implementation in Standard, the Universes Beyond Commander decks are typically themed to perfection and draw on the source material to identify strong mechanical comparisons within Magic that make the game easier to understand
Copying an instant or sorcery spell is best reserved for when you've got a critical spell in hand, like an extra-turn spell
Bloodrush is very similar to channel, in that you have to pay the cost of the card and discard the bloodrush card
Normally, development gets rid of the stuff that ends up at the bottom, but I always come in saying, "Don't kill this one." I give my little speech about how we need our Johnny build-around-me rares and I have enough clout that I'm usually able to save them
However, its potential will be tested in Legacy, where efficiency is paramount
each Play Booster contains: 14 Magic: The Gathering cards