sam_dutt
well I have an idea,it's not something he can do real quick and early into the story.If you want to use it inthe story you can. The 8 gates are a tenketsu points that limit the chakra flow and prevent the user from harming them right. Characters like Might Duy,Might Guy and Rock Lee are shown to open them all at once which increases their speed and strength greatly in exchange they go through excruciating pain. So my idea is to open the gates partially,like you open a gate just 1% and let your body get familiar with the pain and keep it going to a point where the pain and harm to the body is literally zero. This is process is repeated until he can open the gate fully without damaging himself. The MC could just try this technique since he wants great strength and the 8 gates formation is a technique that took on six paths Madara,who is super op.