Target player draws four cards, then discards three cards. If you cast this spell during your main phase, instead that player draws four cards, then discards two cards.
"Sages who take the time to verify their sources are rewarded for their diligence."
—Jhoira, to Teferi
If a spell or ability copies Careful Consideration, the target player discards three cards for the copy after drawing four cards. This is because the copy wasn't cast at all.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.