When Leon finally managed to wound the Royal-Guardian severely and damage it's battlesuit, Leon thought of a plan which could work in the situation. He would have to sacrifice some back-up for this situation, but it should be a viable option.
Leon attacked the battlesuit with Shadow-sword Time, and when the battlesuit's breast area was forced open, Leon immediately ordered AIGIS
" Invest 3 points into Qi." Leon ordered. AIGIS followed the instructions and Leon felt Qi within his body rapidly increasing.
He aimed directly at the opening of the breatplate, and used flash step along with pierce, and all his strength skill. The secret weapon was the Qi.
He infused around 60% of his entire Qi reserve into this attack. This time, the attack was successful and the immense Qi content of the attack resulted in the breastplate being destroyed and the sword piercing the Royal-Guardian's heart.