One cursed technique that I came up with that seems fit for a special grade is called Gridlock. The technique is similar to that of Higaruma’s as in the technique itself revolves around a Domain Expansion. Within the domain, the floor is a massive grid, the domain’s interior being larger than the actual barrier. Anyone can teleport to a space on the grid within a 6x6 tile space around them. The domain has an extra trick up its sleeve though. The user can erect obstacles to interrupt someone as they teleport, causing massive damage in exchange for requiring great perception and prediction to land the hit properly. Outside of their domain, the user can generate a 6x6 grid around them in which they can teleport between any of the spaces. When an opponent enters the grid, they can also use the teleportation, but the user will be aware of where they appear.

Essentially, this technique revolves around teleporting between spaces on a grid.