Furthermore, you can use this copy to attack or as a way to get the most out of any ETB effects on your board
Cards can be from a variety of sets or a single set (at the time of this listing a number of Double Masters lands just went into these packs!)
Cards like Lagrella, the Magpie or Fiend Hunter work perfectly with ETB strategies because they temporarily exile creatures, which lets you retrigger their effects once those creatures return
This effect drops off at higher power levels where decks are more likely to win through a combo than a mass of creatures, but this can stop many combos, like Glint-Horn Buccaneer, anything with Kiki-Jiki, Mirror Breaker, and combos that loop cards like Pyrite Spellbomb or Moonglove Extract for infinite damage
The delayed triggered ability created by chapters I and II triggers separately for each of the target creatures, even if, somehow, they end up dealing combat damage to the same player at the same time
But what is a Prerelease