Deadly Complication is a uncommon Sorcery card from Murders at Karlov Manor (MKM), collector number 312. Current market price: $0.13 (foil $0.14), TCGplayer market prices via Scryfall.
Choose one or both — • Destroy target creature. • Put a +1/+1 counter on target suspected creature you control. You may have it become no longer suspected.