Originally Posted by The Glyphstone
Why a Monolith and not, say,a Night Scythe transport? Neither vehicle has much in the way of warp-related technology - Monoliths for certain don't have any such tech - and the Necron Lord probably has more Night Scythes in inventory than Monoliths.
Monoliths have a triangular warp null field the Culture know about. (they used it on the Ork invasion)