The room becomes very chill, and at the same time, a cold fog starts to form, quickly obscuring vision to a degree impenetrable even to Dr. Lazarus' Auspex. Dr. Lazarus feels the cold moisture start to condense and freeze upon his dead flesh. At the same time, he hears Wegst start to scream, then whimper... then finally there is silence.
When the fog clears, Dr. Lazarus sees Wegst curled on the floor, his eyes and mouth open in an expression of sheer terror and his body covered with a thin white rime. He appears to have frozen solid.
By delivering a human as a sacrifice to the darkness, Dr. Lazarus has committed a sin against at the Humanity 2 level. Roll 2 dice to see if he suffers Humanity loss, and if so, roll against his new Humanity score to determine if he also develops a Derangement.