Chemical Mastery

By 15th level, you have been exposed to so many chemicals that they pose little risk to you, and you can use them to quickly end certain ailments:

• You gain resistance to Acid damage and Poison damage, and you are immune to the Poisoned condition.
• You can cast Greater Restoration and Heal without expending a spell slot, without preparing the spell, and without material components, provided you use alchemist's supplies as the spellcasting focus. Once you cast either spell with this feature, you can't cast that spell with it again until you finish a long rest.