I would like to add a Material Instance to my Landscape Material, But there is no Blueprint for Material Intances.

Hey Everyone, I just downloaded the Soul Cave assets to my project, I am setting up a Landscape material (I want to have around 4 materials in my landscape) and so far so good, I open the blueprints of the materials, and copy it to the Landscape material Blueprint, everything was going smooth until I realized one of the materials I wanted in my Landscape material, is actually an Instance material, I now find myself lost, because there are no blueprints for instance materials. All I want is to be able to add an Instance Material to My Landscape material, so I can paint with it to my hearts contempt (hope I wrote that right ahhaha), anyway, here is a screenshot of what I am faced with, hope someone can help.