The grid doesn’t ever show the new cenarion minis to allow buying stars needed for upgrades. The heroes are the only cenarion minis that ever show. I’ve spent about 10000 gold and haven’t seen the other cenarion minis a single time. This also happened with raptors and execute. I had all other minis to rare before getting 3 stars for those 2 minis. This is worse however, I’ve done 100+ plus grid purchases and have never seen one of the cenarion minis other than the 2 heroes…
I have gotten a few stars from the events rewards but it isn’t enough to upgrade to rare. 1, 3, 5 etc.
How are we supposed to complete the upgrade cenarion minis challenge if we can’t get the required stars? I also purchased the deals when I could. But the bog lord and moonkin can’t be upgraded beyond uncommon without the ability to get more stars from the grid.
unfortunatly this is no bug. they informed already that the non leader minis will show up later on the grid after the event ends. u can finish this quest only by spending money 
there will come some other packs where u can get stars for the moonkin and bog lord
They really thought this through. You need 38 stars to get epic. Times 5 minis. Even if these minis were in the grid you’d still need to spend money. The reason is because maxed out minis still show in the grid.
So I can’t spend money on the grid because the minis aren’t there… So I need to directly buy these stars from an offer… that also isn’t available.
I don’t think they have realized how much money they are missing out on because of their flawed thinking. They should have the data to see that I spend money on this game but between it actually not functioning or by not offering me the thing I want to purchase I can’t spend money…
It’s like they want my money but slowly lol. Not too fast. Don’t let them buy all the stuff at once. Slow roll 'em.
It’s like they are half way decided what type of game this is. It’s completely pay to lose but they want to keep selling it as f2p.
The grid idea is like a poor slot machine. A normal slot machine you can keep playing until you have no money. This is like random if you can even put money in.
They could have leveraged their IP and made a fun well tuned game that you can actually spend money on.