After a whirlwind week of previews, we finally know all the contents of Commander 2019
And then you can equip an equipment you control for free on each Rebel, so you'll save mana and get hasted dorks swinging with big pumped up power and toughness for strong damage
Discarding to pay for abilities of cards you already have in play
Accumulate Wisdom allows you to draw three cards for just 2 mana, if you have three or more lessons in your graveyard, so its an interesting payoff for a spellslinger deck filled with lessons
If you stack two cards on top and then Opt or Sleight, you are selecting cards you already spent a cantrip selecting for
You can pretty much only cast those spells if you get Cloud Key + double Sensei's Top for the zero mana storm combo, which is not likely to happen consistently enough (although it's cool as hell)