by pmsupport » Wed Mar 05, 2014 9:42 pm
Hi DrRickso, even with the max 3 chests, the drop rate of Rainbow Map is close to the panzer drop rate in hell mode, and better than the panzer drop rate in insane mode. Rainbow Maps are used to evolve 6 star and 7 star cards, so they are the "panzers" in the materials.
Enjoy the game!
Playmage Support