Dead Before Sunrise is a rare Instant card from Outlaws of Thunder Junction Commander (OTC), collector number 62. Current market price: $0.37, TCGplayer market prices via Scryfall.
Until end of turn, outlaw creatures you control get +1/+0 and gain "{T}: This creature deals damage equal to its power to target creature." (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)