Just what I was thinking. Buer is a wheel of fire that does more damage the more souls you have. The flame demon is like his ice attack but maybe stronger.
Boss rush rewards (unknown requiriments) Nunchuck:great for tank busting and iron golem farming overall mediocre RPG (rocket launcher):definitely worth it does 100 damage in default, doesn't get affected by damage upgrade allowing for more focus in souls and it is also long range. A much better alternative than something like the silver gun Teddy bear:a obvious joke weapon worse than your fists alone