The Bladed Shield Formation

An hour before the mock battle.

'What do you mean I will help you defend better? I am an assassin; at most, I can help you drop bodies faster.' (Josh)

'I agree with him, Captain; Just like how I can barely help when the melee starts, I usually move to pick targets around the brawls. Otherwise, I would get attacked the moment I am seen.' (Adriel)

'This is because both of you still think you are only assassins, Abel. What is the most difficult part of being a shielder?' (Cain)

As the two assassins were left perplexed by the line of thinking of their captain, they stayed silent to see if they could learn something from the man who literally had two minds. Finally, after a few moments of reflection, the shielder answered.