Blacksmith'S Hardening [Style]

My forge is hot, the hammer strong and your face gone.

Prerequisites: BAB +3, Craft(Weapon and Armors) 7 ranks, Blacksmith Style, Weapon Focus(Any Hammer)

Benefit: When your enemy takes cold damage within one round after you used forge your enemy, the duration of forge your enemy is increased until the end of the encounter.

The blacksmith style may only be used with weapons from the hammers weapon group, except those made from ignitable material.

Special: You cannot activate styles out of combat. Activating a style is a swift action and you can have solely one active style at a time.