Earthwork ridge left over from the rot sticker defense, now an obstacle the charging crawlers must scramble over.
Partway across No Man's Land, Carl reaches the remnants of the dirt spine from the rot sticker defense and scrambles over it. Built as a defensive earthwork during the earlier Rot Sticker Behemoth fight, it now bisects the killing ground the crawlers have to cross.
The hazard is not only the climb: the corpses lying along it still have to be watched, because they can remain dangerous. The spine is one of several relics of previous battles littering a field that has been fought over repeatedly.
A long ridge of piled dirt crossing the battlefield, eroded by bombardment and strewn with corpses.
A leftover earthwork obstacle in the crawlers' path to the enemy trench.