Alchemical Savant

5th-level Alchemist feature

You've developed masterful command of magical chemicals, enhancing the healing and damage you create through them. Whenever you cast a spell using your alchemist’s supplies as the spellcasting focus, you gain a bonus to one roll of the spell. That roll must restore hit points or be a damage roll that deals acid, fire, necrotic, or poison damage, and the bonus equals your Intelligence modifier (minimum of +1).

I just need a really quick clarification.

If i cast Healing Word (1d4 + your spellcasting ability modifier) with a 20 Int using my pestle as a spell focus, am I healing 1d4 + 10?

To my understanding, that is correct. For the math, it would read (1d4+mod)+mod

Yes. Mod gets added once by spell and once by feature.

Thank you for the clarification. It almost makes up for Experimental Potion.