Oviraptors are useful for boosting nearby creatures’ egg production and, in some versions, gathering wild eggs without provoking their parents; they do not increase mutation chances, and their egg-laying buff does not stack. Set one to wander near the creatures you want to benefit from, but keep it contained or encumbered so it stays put, and feed it meat after taming. When encountered, it is generally harmless and quick to flee, but avoid crowding or taking its egg, which can make it hostile; taming requires eggs.