unferth's need to be the most famous soldier in the Kingdom Is the scene from Beowulf reading that is an example of internal conflict. King Hrothgar's despair over the inability to defeat Grendel. Internal conflict in literature is the struggle occurring within a character's mind.
Realised needs to be changed from the past tense to the present tense so that it is realise. In this case, the verb is part of a prepositional phrase and is being used to talk about moment within a story set in the past.
Have forgotten needs to be changed to had forgotten since it is a past action that happened before another action in the past.
Bought and got need to be changed to buy and get so that the sentence is parallel. These words are part of a series of actions that starts with the wake.