You've been forced to drink Earth Essence by your former employers till it has become a part of your life. You require at least 2 pints of it every day otherwise, you suffer withdrawal. You have, however, developed a tolerance to its negative effects, completely negating it without any rolls needed.

Breaking Free. Every time you level up, can choose to attempt to break. To do so, you have to first succeed a DC 15 Wisdom on Intelligence check(Your choice), and then, Roll for withdrawal and get a 20 or higher(Still apply the effects). This is dropped to 10 if you succeed the first throw with a margin of 5 or greater. If you succeed, you remove all effects of this feature. However, even drinking a small amount of Earth Essence after this could cause a relapse(DC 15 CON Save to avoid).

Withdrawal. Every time you cannot consume Earth Essence, You roll a con save and apply an effect based on the table below. Roll with advantage if you've had at least one pint of Earth Essence. Roll with disadvantage if you've had none in the last 48 hours