Fill a Tesseract Frame with one bucket of Molten Ender in a Liquid Transposer to create an Unattuned Tesseract. Molten Ender can also be stored in buckets and placed in the world where it flows like other liquids. If you touch the liquid, you will be randomly teleported a short random distance and direction, even through walls, ceilings, or floors. Use near lava often proves comical and disastrous.
This video shows you how to use molten ender with tesseracts