By drinking this you gain a powerful Stand:
*You can design one stand, its form, stats and abilities will be what you desire, but very weak. This will be it's ACT 1. Like every stand with Acts, your Stand will grow in power, soon reaching new acts and unlocking new abilities, your's in particular won't have any limit, being capable of growing in power and reaching new acts even more powerful than previous ones.
*You also will gain the ability to awaken Stands in others. Instead of choosing it's form and abilities, it will be what best fits them, and unlike a stand arrow, this ability will always work.