Board Thread:Game Discussions/@comment-96.49.190.238-20140208235640/@comment-5612420-20140210022840

Go for boss 60 every week and save up those dark prince keys. After 8 weeks, you can wait for the next dark prince chest event, spend 40 keys for the additional fusion boosts.

If you want some fun, join a top 10 guild. There's plenty of adrenaline during wars.