Arcane Subtraction
Instant
Learn. (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.)
The class learned little that day.
Legal in
Pioneer, Modern, Legacy, Vintage, Commander, Pauper, Brawl, Historic
Rulings (4)
If you bring a card into the game from outside the game in a Constructed tournament (or a Constructed game played under tournament conditions), you may select only a card from your sideboard. In casual Constructed games, the card comes from your collection.
2021-04-16
If you bring a card into the game from outside the game in a Sealed Deck or Booster Draft event, you may select only a card that is in the card pool that you built your deck from.
2021-04-16
If a card is brought into the game from outside the game, it will stay in the game until it ends or until its owner leaves the game, whichever comes first.
2021-04-16
If instructed to learn, you may do nothing. Discarding a card and putting a Lesson card into your hand are both optional.
2021-04-16