Listen to the conversation with Reggie who will tell you about three new Core Relays (you got their locations on the map). You have to get to each of them in order to get new powers. Of course you can reach them in any order but I suggest to start with one located nearest you. You can find it in the eastern part of Queen Anne district, where you completed previous main quest Welcome to Seattle.
On your way to the first Core Relay keep in mind that if you get close to any group of D.U.P. soldiers you'll be automatically attacked. You can of course use such situations to acquire Good or Bad Karma or just avoid confrontation. In the latter case I recommend using Smoke Dash and move over rooftops and railroad tracks. Your target is located on the building rooftop and in order to get there you have to locate a red ventilation shaft at the building base (use Smoke Dash there).
When you get through the first shaft, jump into another one so you can get to the highest part of the rooftop. Be careful because there are three enemy soldiers in the area - get rid of them. Due to the fact that enemies are located on a small balcony, you can attack them with Cinder Blast or the chain. After the fight approach Core Relay which has a metal casing and destroy the shield with any offensive power (you can also shoot at ammo stash and the explosion will destroy the casing). Now you can absorb the energy from the core (press touchpad) and unlock Comet Drop.
Thanks to newly unlocked Comet Drop you can hit the ground with great force, thus injuring nearby enemies and destroying nearby objects. It would be good to test it right now on enemies who appear in front of the building. Bounce from the roof (you can also fly a bit) and then press square button. If you aimed properly, your hit should eliminate or seriously injure all D.U.P. soldiers.
You can now head to the second Core Relay. It is located in Seattle Centre district. The district can be found south from the Queen Anne district. Your target is abandoned ferry port - watch out for the enemy base located on the north-east from it (assuming of course that it is still active).
There are some D.U.P. soldiers gathered on the courtyard in front of the ferry port. You can deal with them in traditional way or by using newly unlocked Comet Drop. In the latter case you should get to the rooftop of one of the highest buildings in the area and then bounce from it and hit the ground in the right place. Regardless of your behavior get rid of all enemies, destroy core casing and then absorb its energy (press touchpad). This time you'll get Sulphur Bomb.
Just like earlier, the game will allow you to test the newly acquired power, because there will appear more enemies in the square that you have just cleared. The Sulphur Bomb attack (the L1 bumper) is about throwing the enemies a stunning bomb. You can then stun them without any problems (acquisition of good karma) or take advantage of the fact that they are harmless now and execute them (acquisition of bad karma). Get rid of all of the enemies, or escape them (it is not necessary to eliminate them).
It is time to move to the last Core Relay. It is located in Market District, south from the Queen Anne district. You have to get to the narrow alleys between buildings. In one of them you'll find few D.U.P. soldiers guarding the core. Eliminate enemies, destroy core casing and absorb the energy (press touchpad). After a moment you'll gain Cinder Missile.
Cinder Missile attack is very impressive, because it allows you to fire missiles which can destroy enemy armored vehicles. Aim at the enemy machine which appears near the alley and press R1 button to blow it up. It is worth noting that this power uses Heavy Ammo, which can be obtained in the process of acquiring smoke to regenerate energy bar. Listen to the conversation with Reggie which ends this main quest. Rewards for completing it are listed below:
- Unlocking main quest The Gauntlet
- Unlocking side activities in Queen Anne district