Archdruid's Charm is a rare Instant card from Murders at Karlov Manor (MKM), collector number 408. Current market price: $10.25 (foil $15.35), TCGplayer market prices via Scryfall.
Choose one — • Search your library for a creature or land card and reveal it. Put it onto the battlefield tapped if it's a land card. Otherwise, put it into your hand. Then shuffle. • Put a +1/+1 counter on target creature you control. It deals damage equal to its power to target creature you don't control. • Exile target artifact or enchantment.