This set features over 277 standard cards alongside a bunch of drop-dead gorgeous versions of the cards from the main set, which all focus on Eternal Night creatures such as werewolves and the classic vampires
If an effect instructs you to sacrifice a creature, and you control any creatures other than the ones you gained control of with Call for Aid this turn, you must sacrifice one of them
Like every newly released card, Battles will need to be evaluated on a case-by-case basis, given their mechanics don't seem to break the game pattern so much as to make them a semi-mandatory feature in every deck (unlike what we saw with Companions)
Future bulk rare
I only included sites and stores on this list that Ive personally bought from and can attest to, but I will continue to update this list as needed and as I buy from more, so stay tuned!
If you cast a spell for another cost "rather than pay" its mana cost, you can't choose to cast it for any other alternative cost