Essence of the Knife
This quicksilver-like beverage tastes like steel and has a sharp fizz.
*Upon imbibing, you are granted a knife, which can take on any shape and design you wish, though no smaller than a scalpel's blade and no larger than a shortsword.
*This blade cannot be detected by magical or technological means. You may summon or dismiss it into a pocket dimension at will.
*As long as enough pressure is exerted, the Knife will cut through any material. It can even cut intangible things such as sickness, space, time, enslavement or even Fate. It will not cut you unless you want it to, and even then it will not cause you pain.
*Just as you may teleport the Knife to you, you may teleport to it.
*You gain intimate knowledge and muscle memory that allow you to wield the Knife in all its forms like a master, whether it be for combat or cooking.
*You can kill anything that lives with the Knife, ignoring any and all forms of immortality. Any being killed by the Knife will have all of its powers and abilities added to the Knife, granting it a new form. Those abilities can then be accessed through the Knife and wielded as if they were your own. You may decide on the conditions that might go into using said abilities. Abilities and forms can also be unlocked by allowing the Knife to absorb materials.
*The Knife may be used as a focus for magic of all sorts.
*With enough focus, you can learn to multiply the Knife into many, and control each of them telekinetically.