How to do brush calligraphy with the Tombow blending palette (+ a video!)

When Brittany from Tombow first sent me the Tombow blending palette to try, I ashamedly let the palette sit in the corner of my crafting table, staring at me for a while. Why didn’t I dive right into this amazing tool that effortlessly blends my favorite brush pens? I had no clue what to do.