The Vagary is the first boss of Doom 3 and first encountered at the end of Alpha Labs Sector 4. She has the lower half of a giant spider and the upper half of a woman. She is analogous to the Spider Mastermind in Classic Doom. However, unlike the Spider Mastermind, the Vagary is weak compared to the other bosses in Doom 3 and returns in a later level (Caverns Area 2). Her attacks are a simple melee, as well as telekinesis, which she uses to lift and throw various heavy debris laying around at the player. Its transparent abdomen contains a malformed Mancubus fetus gestating inside.