Benjamin hadn’t really noticed before, torture actually required a lot of imagination.
Benjamin started by using more gentle means of torture. For example, using a harmless move like the ice needle and piercing it through the pirate boss’ fingers. He let it travel through the skin and come out at the sole of his feet. He would then use a water ball of healing to heal him. He repeated this torture method ten to twenty times.
The other crueler moves he could not do due to how kind he was.
The System was oddly excited throughout the whole process and kept yelling things like "Use steam and put it up his ass! Take out his liver and feed it to him! Fill his lungs with water then take it out...". Even Benjamin was uncomfortable. An innocent face saying these things, it really was embarrassing.