Dossier: The Professor (Mordin)
To recruit Mordin Solus, a brilliant Salarian scientist with a complex past, Shepard must travel to Omega's quarantined district. This mission, titled "Old Blood," is a critical step in assembling the team for the suicide mission. navigate through plague-ridden areas, battling waves of vorcha and other infected creatures that have succumbed to the virulent disease. Mordin's recruitment mission serves as a potent introduction to the devastating consequences of the genophage, a biological weapon developed by the Salarians to control the Krogan population. Shepard will witness firsthand the suffering caused by the plague and learn about Mordin's involvement in its creation and subsequent efforts to find a cure. Mordin's unique expertise in medicine and genetics makes him an invaluable asset to the Normandy crew, particularly in understanding and combating the Collectors' biological warfare. His dialogue often reflects his pragmatic and scientific worldview, offering unique insights into the galaxy's various conflicts and ethical dilemmas. His loyalty mission, "Old Blood," further explores his past and presents Shepard with a difficult choice regarding his former research.