I play this in my Urza, Lord High Artificer deck so I can keep it tapped down on my opponents turns
On average, if you opened six Collector Boosters, you would expect to get a combination of 5 common and/or uncommon Lesson cards, as well as 1 rare or mythic rare Lesson card
Surveilling 2 on the plus ability of a planeswalker is strong, even if it doesnt give you cards, and you can get card advantage by making your opponents discard cards while feeding your graveyard synergies
Faster Duplicate Protection and Set Completion With these changes, it's faster to collect a playset of reprinted cards
Without any modifications, it only takes three combat phases to deal enough poison counters to an opponent to make them lose the game
Starting with Theros: Beyond Death in January 2020, Wizards started putting cards from these Commander sets in the main set's Collector or Set boosters