A green glass bottle shaped like an apple

You pick up a green glass vial, shaped like an apple about the size of a golf ball. A cork with a label tied to it seals the vial and inside you can see some sort of viscous liquid that swirls sluggishly within when you give it a shake.

Examining the label reveals a bunch of angular symbols. Perhaps some form of writing, you don't recognise the script though. A search through your uncle's book reveals it to be something called Eve's Philtre and that it brings knowledge, albeit at a price.