I feel like ur just lucky I've used 60 secret letters like 50 in co-op, and I've gotten more than 30 of those red cubes

Idk I've played both solo and coop and there was no difference at all... I really think it's random. also I hear people saying there's a gold guarantee after 10 waves, but I've honestly never seen it happen myself. can someone confirm or deny that?

and at wave 10 it's guaranteed a golden card

Actually, you're wrong. It's completely random. I opened it in solo mode, and each character took 5-9 attempts.

I will keep this in mind 😅 thank u for sharing!!!🌷

I only do co op.. People are so fast... I just have to run to end point and others will clear it in seconds.. Easyy... 😂