I dunno man. Theoretically Grim Trick could just be a different way to teleport that has an application in traversal. Given how it worked in DmC, having a sword embedded in an enemy just meant that it could act as a tag, or marker, that made it simple enough to teleport to. Technically, if it works that way, you could theoretically use Air Trick to teleport to a locked target, and Grim Trick to a tagged enemy.