Yes, lesson is a card type
Based on the league results, and until the banlist is expanded to weaken Blue, the only good decks that can be played in this format will be mono-blue, or heavy on blue.
Grave Danger Commander: Gisa and Geralf (Originally printing: Eldritch Moon) Exxaxl: Dimir precon
Court of Grace is a hugely popular addition from Commander Legends , and deserves a slot in many white decks
A player's ability to play lands is one of the most inherent actions to the game of Magic, so attach that to an absurdly powerful effect and you end up with this cool cat
Destroying a rare bomb is one thing, but the fact is that Stroke of Midnight is incredibly weak at removing middle-of-the-road creatures, and removal really should be good at doing that