This is just a rough concept of his graffiti can.

After entering this unknown realm, another portal can be drawn anywhere to leave, and the portal will appear form thin air on the surface.

This graffiti can’s enchantments are Aether sensitive, meaning it can be charged with Aether. After being Aether charged, the user can throw the can, and the impact will automatically spawn a portal in a flash, which is good for quick escapes but the can needs to be picked up.