Chemical Laboratory

All creatures in your graveyard have "{b}{g}{u}: return this creature from your graveyard to the battlefield tapped."
All creatures in your graveyard have "Scavenge {3}{b}{g}{u}: ({3}{b}{g}{u}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)"