Grand Master cheese with new Scarlet Witch

Gigi

So now that I got your attention, can anyone say how do the new store event works? I don't wanna waste shards tokens in the 4* shards. So how do I move to the next items without spending in things that I don't need.
Sorry for the title but that's my second post that got ignored and I want to know how this works

Kabam Miike

Please use the Thread designated for this: https://forums.playcontestofchampions.com/en/discussion/271791/summ-on-er-event#latest