Hours earlier, W and Bloody were wandering the demolished capital. The two were in a pitiful state, Bloody had shrunk to half his normal size and W was delegated to becoming nothing but a part of him once more.
The two blobs had been slithering past or atop the rubble and debris searching for an ideal host to leave the capital with. That made it sound trivial however, with every building leveled there were lines of sights everywhere.
The humans that weren't starving were digging through the rubble for things of value, and if they weren't digging they were looking for someone to beg or steal from. They had to make hide if there were watchers and make sure they weren't dug out if they were hiding.
For this, the blood sense came in handy. Since Bloody could see everyone's blood, avoiding the diggers was easy. But why not just grab someone and go? Why go through the hassle?