A general point to bear in mind for future tags and this one:
Its MagicDuel or Magicduel. I prefere MagicDuel, but its not two words.
Also, Personally I wouldnt put negative comments on the titles, using the word pestering seems negative, and I dont like that in a title document.
To the tag, Changes I would make or consider suggesting:
>>Awarded this title for his dedication to his role as [a or the] Guardian of Bob.
Fits better adding this.
>>Through his ongoing persistence and pestering,
I wouldnt have pestering as above.
>>Throughout time past, his dedication did not waver, even with the promise of fame and status.
Too many commas. A general rule is that if you have a sentence in three parts (separated by two commas) the middle section should be able to be removed and still make sense. So I would change this to either:
A) Throughout time past[removal of comma] his dedication did not waver, even with the promise of fame and status.
B) Throughout time past, even with the promise of fame and status, his dedication did not waver. (middle can be removed and sentence makes sense)
---
The other bits seem fine