In "The Lake of Souls" by Darren Shan, the characters face dire challenges and eerie encounters. The atmosphere is charged with suspense, especially when the mysterious phrase "If he comes in the dark, then it's KYAG Time!" is introduced by Harkat Mulds. This quote signifies a crucial moment when danger looms and the action must be heightened to confront the unknown. It sets the tone for the urgency and tension that pervades the storyline.

The narrative explores themes of bravery and the looming presence of adversity, emphasizing the group's need to stay united in the face of fear. Harkat's words encapsulate the essence of preparedness, reminding characters and readers alike that when darkness arrives, they must respond decisively. This pivotal moment in the story challenges the protagonists to tap into their inner strength and confront the shadows that threaten their journey.