Does anyone know, about how many löst battles it takes to unlock Matthis?

I'm following to see if anyone chimes in with how long it took them. I haven't unlocked this challenger yet either! I tried before the revamp and I think I've given it a shot after the revamp, but I am so impatient.

On the original announcement some people said 10 tries good luck :D

its random, but you need a specific minion attahed as well and have been known to work

I just got the challenger at 10 losses. LOL! I can't believe I gave up so fast, if it's a true 10 losses. Shameful, my lack of patience. Plus, each loss hurts a bit. Thanks for asking and for the help!

I will try again as soon I have time and patience for it. I will keep you informed, as soon as I am successfull.

Took me 8 losses today to unlock him. Thank you for your info.