Strength of the Sword 3

Enter the Challenge Pit from the Main Menu. Choose whatever sword and shield setup you like. Also make sure to select Insane difficulty when prompted. As soon as the four Goblin Scouts spawn, run into the crowd and use the Lightning Storm ability. You should kill at least 2 of the Goblin Scouts with this attack, if not all of them. Before you repeat the process, make sure you finish the Challenge Pit (either die or let the time run out). Otherwise your progress will not be saved. You could also earn this trophy by weakening the four Goblin Scouts, luring them into a group of 2 or more, then tossing a grenade at them. The explosion should kill them both at the same time. If done correctly a notification will appear at the bottom of the screen saying "DOUBLE KILL". It is possible that you might acquire this trophy naturally while working toward Blade of the Gods.