This update includes a few Learn cards, which I'm pretty excited about. They don't work as written - Lessons are really weak at this power level, and are kind of hard to draft.
What we're trying for this is houseruling all instants/sorceries to be a lesson, but you can only get lessons that match the color of the learn card.
This means that Learn cards are rewritten to say "You may reveal an instant or sorcery card that is the same color as this card from your sideboard and put it into your hand, or discard a card to draw a card."
Another solution we considered is to restrict what you can get by CMC, instead of color. That feels too restrictive - white, blue and green only have 4 or 5 possible targets in the cube.