Giants
Your Giants may conquer any Region adjacent to a Mountain Region they occupy at a cost of 1 less Giant token than normal.
Don't forget you need a Giant on the mountain!
Sorcerers
Sorcerers can only convert 1 token per turn and per opponent, and only if the token conquered is Active!
Sorcerers can't convert region with Encampment :
Each Encampment counts as 1 Race token toward the defense of the Region in which it is placed thereby protecting a single Race token with an Encampment from the Sorcerer’s Racial Power.