Li Yao hid the real reason because he did not want the Fire Ant King to think that he was too crazy.
The reason real he carried the cannonball for the main gun of a heavy crystal warship, which had been added with even more gunpowder by him, was that he could take it out and die with his enemy when there was no other choice.
It was a good habit that Li Yao had developed when he was still in the Refinement Stage. At that time, he had become fond of walking around on the battlefield with a box of powerful bombs named Hellfire-Lightnings. It was exactly with an entire box of Hellfire-Lightnings that he had slain an enemy beyond his level for the first in his life, which was a 'Six-Armed Naga' in the demon general level.
Right now, his Cultivation had soared. The level of his 'suicidal bomb' naturally increased, too.
As it happened, the penetrating bomb was perfect to open the iron can that was buried deep under the ground.
