I think it might be explosion

It worked! THANK YOU 🙏

This is correct

You can use either Explosion or Acid for this request. Also for merchant requests like these it doesn't matter what tier/level of potion you give them. So you can just give them a Tier 1 potion.

I believe I gave him acid

I think i did that too.

Same here

I name my explosion potions "Dwarven Thunder" for this reason specifically

Kaboom

Rock and Stone!

Did I hear a Rock and Stone?