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A Troll-graded W.O.M.B.A.T.

"This is to certify that you have failed W.O.M.B.A.T. Grade 2 and have been awarded the classification of Troll. Although this was a difficult examination, it was quite an achievement for you to score zero. We are forced to conclude that you were either making a rebellious statement about the futility of formal education (in which case you are probably a member of a subversive goblin group), or that you were too busy attempting to eat the examination paper to notice the questions (in which case, you are a troll)."
— A letter sent to certify a Troll-graded W.O.M.B.A.T.[src]

Troll is one of the three failing grades, out of six grades overall, in the Ordinary Wizarding Levels, Nastily Exhausting Wizarding Tests, and Wizards' Ordinary Magic and Basic Aptitude Tests. It is the lowest mark, immediately below 'Dreadful'.[1]

It appears to be generally be reserved for those who receive the worst score possible, usually through making an extra effort to fail.[2] There are no known recipients. Some people, including Hermione Granger, did not know it existed, hinting that the grade is seldom attributed.


If a student is given a 'Troll' grade on their O.W.L. exam, they have failed that subject and are thus unable to continue with that class at N.E.W.T.-level. The same goes for the other two failing grades: 'Poor' and 'Dreadful'.[1]

Recipients of a T

There are no known recipients of the grade.

Behind the scenes

Other grades

Exam grades
Passing Grades Fail Grades


Notes and references

  1. 1.0 1.1 Harry Potter and the Order of the Phoenix, Chapter 15 (The Hogwarts High Inquisitor)
  2. J. K. Rowling's official site - W.O.M.B.A.T. results
  3. LEGO Harry Potter: Years 1-4