From their announcement:
Our Orcs & Goblins range is expanded with a new Goblin hero, Skrigg Dwarfmocker and his shieldbearers.
The model, sculpted by Felix Paniagua, shows the Goblin chief on a stolen dwarven shield, carried by his bearers… just as good as those damned Dwarfs!
The model is based on conceptual art by Felix himself. Kevin Kingmong is the author of the color ilustration for the blister card.