The Smith

"When Surthranor the realm smith swung his mighty hammer Reykjarök down onto the terrestrial anvil known as Theia, the sparks of creation flared and life came into existence." - History of Theia Vol. 1

Surthranor is the god of fire and creation, he is the patron saint of all craftsmen. However to some he is also known as a god of war and destruction. 
It is believed that the smith forged the rough shapes of the world we know today from the primordial body of the Tidemother. Despite their opposite elemental allignments it was the combination of their powers that made the creation of life possible. He personally created Cerys and the dwarven race according to legend. His primordial form is depicted as a shifting volcano taller than the highest of clouds.
Some believe that it was a blow from his fiery hammer that brought ruin upon Igni. 

Season: Winter
Holy Symbol: A Hammer and Anvil with flying sparks
Domains: Forge, War