Quote Originally Posted by deathexe View Post
That's for iOS. By completing level 29, you should have 22 materials ( 1 material per kill from 15 - 21, 2 material drops from 22 - 42 )

Basically, if you want to summon the boss from 29 onwards, you would have to summon the boss once for each level from 30 to 43.
the cost of the gem gonna rise for each summon ? im kinda confuse which level you refering to, my victory reward lv or the boss lv. im android user, sorry for that.