Claw Mark

Code has the unique ability to mix chakra with the iron from his blood to create portals to travel to previously marked locations.

Overview
Once applied to a surface, Code is able to freely travel to any of them, regardless of distance — even if they're in a different dimension. While it only allows him to move through them, he can take one other person with him at a time. Despite this, Amado doesn't consider this ability to be space–time ninjutsu. While mostly used in battle or for transportation, Code also employs them as a means of communication, putting his mouth or ear through them to contact Ada.

Although primarily chakra-based, they also contain iron from Code's blood which when mixed together causes them to become physical matter making absorption from Kāma impossible..