Answer: Oxymoron
Step-by-step explanation:
An oxymoron refers to a self-contradicting word. An oxymoron is a literary device thars used in putting two words that has opposite meanings together in order to create a special effect.
In this case, weak and blazing are quite opposite. Blazing here represents outstanding heat, intensity of speed. This is opposed to weak which means full or lack of energy. Therefore, this is an oxymoron.