I just noticed something that surprised me (see screenshots). Not that I didn’t know that it was technically possible, but I thought it was too extreme to be likely.

At the end of season 12 when rankings are frozen, I’ll take a look at the amount of Mana I have earned. If at least one user (from any of the Diamond leagues) promotes to Masters while having earned less or as much Mana as me AND at least one user (from any of the Diamond leagues) demotes to Platinium while having earned more or as much Mana as me, then this market resolves YES. Otherwise it resolves NO.