(You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.) As long as this card is in your graveyard, if you would learn, you may instead return this card to the battlefield
In Innistrad: Midnight Hunt, one of these will be from the main set, while the other will be a made-for-Commander card that either comes from the set booster or the Commander pre-constructed decks' exclusive cards
Grandfathers old collection, the whole are any of these worth something routine we hear probably twice a week
Marvo, Deep Operative For each clash that you win with Marvo, Deep Operative, you get to cast a spell from your hand with mana value 8 or less for free, which is awesome value

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Iona is a 7/7 Legendary Creature with Flying, and when she enters the battlefield, you choose a color, preventing your opponents from casting any permanent spells of that color