Final answer:
Grendel is affected by the Shaper because the Shaper's compelling storytelling reshapes history, casting Grendel and his kin in a negative light, which makes Grendel question his identity.
Step-by-step explanation:
For Grendel, the Shaper has the unique ability to shape and change the world, creating a sense of order, meaning, and beauty out of a chaotic universe. Grendel is fascinated and enticed by the beauty of the Shaper's art, but he is also enraged by it, since he knows that it false and full of lies.
The reason Grendel is so impressed and affected by the Shaper lies in the power of art and narrative to transform perceptions. The Shaper, with his songs and stories, presents a reshaped version of history that portrays Grendel's community negatively and glorifies the humans.
This act of storytelling is compelling and transformative, making Grendel question his own existence and place in the world. The Shaper's talents in spin a captivating narrative that can inspire admiration, envy, or even a crisis of identity, as in Grendel's case.