Talk:Underworld Tower to Heaven/@comment-2A01:E35:2420:2640:CC0F:D2D0:7F67:2EEF-20170806143814/@comment-32342760-20170806171549

As Akakotsu said, and I'm also using the same trick since already out of free crystals. Even you need waiting and waiting, that's worthwhile than you only use less bps for your rune time. lol I'm even delaying rune boss fight up to 3 hours if I must to recharge fully my bps. XD