This is essentially a storyline achievement. Your "objective" for the first portion of the game is to light four primal bonfires which are being guarded by four bosses.
In the interests of not spoiling anything or revealing any of the game's deadly secrets I won't include any information about the bosses or the areas you have to travel through to reach them. If you want to look up any information on your own, the name of this boss is
For this one you need to travel from Majula through the Shaded Woods and Doors of Pharros to reach Brightstone Cove Tseldora. Work your way through Brightstone Cove Tseldora to find a boss and once it's defeated look for a tunnel on the back right wall of the boss area from where you came in. Follow this tunnel down and through a couple of rooms to find the primal bonfire.