It supposed to be completely random, but there are so many things that implicate it’s incredibly scripted…
If it were random:
- it wouldn’t happen that Murloc Tidehunter’s always 1st to attack in round 1
- you wouldn’t get knocked everytime when exactly the card you needed to make a set appeared and you just don’t have enough mana left to get it
- it wouldn’t be as easy as it is now to predict the last 3-5 attacks in a round
- you wouldn’t get knocked out within 2 or 3 rounds all the time when you’ve not lost a single battle in the 1st 10 rounds
Honestly why would you script a f2p game mode so horrendously…