For the description of the enchantment "Tempo Theft", there is a slight grammatical issue or typo. 
"Steals a small amount of a mob's movement speed and gives it to you for four second."
Since there are multiple seconds, it should say:
"Steals a small amount of a mob's movement speed and gives it to you for four seconds."
It's not really noticeable, just as I was reading this I noticed and had a small giggle.