I'm scouring google images to ID that model. Looks like a new named character though? DOES ANYONE HERE READ SPANISH!?
No need. It's an old Chaos Lord model, however it's associated with one character in-particular - Vardek Crom "the Conqueror", Archaon's right hand man. While I can't read Spanish, it would appear that he - like Valten - is being reintroduced into WHFB.
Here's his model
if you're curious. No need to go to Google when you can check the GW Store X3