CommentStreams:59f76819d3afb4e51f4a1ad58d5bb7f2

Unlike the original event, boss fights now happen in the "Journey" mode, so you could use the four power-ups, but cannot quick fight by reloading the page and have to wait for each fight to run its course. Which is very time consuming if you were going to farm the keys. And even without key farming you are going to have to slow-fight about 100 fights a day.