Talk:Summer 2015 Crystal Bingsoo/@comment-25386610-20150626183011/@comment-25386610-20150627141654

Yep ^ that was what I was thinking. My guess was after +5 it gets really hard. My last 2 S grade treasures I spent 2.3M going from +6 to +9. There's 61 days from now until it ends. That's 61*.03 (per level except last one)*2 crystals=3.66 crystals  per level. From +8 to +9 usually takes me 600k coins so I don't think that would be a good investment.