Haypi Monsters V 1.5.0 Vs. Lost towers

i have no idea, i stuck in 2nd floor for 3 weeks, i just replay several time to get a epic scroll, i played over 200 times. i never seen a epic scroll, if it's not available or the ratio to get it is 1/1000, plz let me know, i gonna quit this game if u don't get any epic scroll until next weekend.