Absinthe

is historically described as a distilled, highly alcoholic beverage.

It is an anise-flavoured spirit derived from herbs, including the flowers and leaves of the herb Artemisia Absinthium, commonly referred to as "grande wormwood", together with green anise and sweet fennel. Absinthe traditionally has a natural green colour but can also be colourless. It is commonly referred to in historical literature as "la fée verte" (the "green fairy" in French).

There are different types of that and different colours.

The most importantly it makes you to see some mental delusion. This just cause of that alcohol percentage of it always beeing high.