The dagger is given "human qualities," therefore this would be Personification.
The word you're looking for is prowess, however you didn't post a list. Prowess means superior skill, strength, or ability. Other similar words are expertise, aptitude, and mastery.
Answer:
To entertain
Explanation:
It is not persuasion as it's not trying to convince you think about something in a certain way, and it's not informative as it doesn't have any dates, quotes, or references. You can also tell it's to entertain as it uses unique and emotional words.