Well, first off you’re going to need to play the new Deckathalon.
Once you’ve gained 35 points in the event you’ll be gifted the Hands of Fate. It’s a one time reward and is the base of all your gauntlet crafting.
After this, you’re going to have to do a lot of runs of the Deckathalon. You’re going to be grinding for school runes of all kinds.