Riveteers Charm is a uncommon Instant card from Modern Horizons 3 Commander (M3C), collector number 271. Current market price: $0.33, TCGplayer market prices via Scryfall.
Choose one — • Target opponent sacrifices a creature or planeswalker they control with the greatest mana value among creatures and planeswalkers they control. • Exile the top three cards of your library. Until your next end step, you may play those cards. • Exile target player's graveyard.