20.
The answer is: D
Explanation
The correct option is D: Bllade.
The word "Bllade" is incorrectly spelt. The correct spelling is "Blade". The other options are correctly spelt:
A: Skulking: Correctly spelt, meaning moving stealthily or furtively.
B: Commander: Correctly spelt, meaning a person in authority, especially over a body of troops or a military operation.
C: Legionaries: Correctly spelt, meaning members of a legion, particularly the Roman legion.