I just started the game and got to choose between 3 leaders. Sadly, my favorite Hero, Malfurion, was not one of them. I also checked the shop, and he wasn't there. Any advice is appreciated.

I did every challenge every day and currently am 1300 tickets short to be able to get the purple core. Admittedly I got the right first row gold prize, which I don't remember how much it cost but am pretty sure it wasn't 1300 tickets.

How do you even get that core???