In the first two drawing videos you can see how to draw the Trolls head in pencil and then ink it with an ink pen. Then in the last three art videos you can see how to color in the drawing with Prismacolor Premier pencils.
How to ink a Trolls face
Coloring Troll Head With Prismacolor Pencils
Prismacolor Coloring Demonstration
Prismacolor Troll Head Drawing Video