Extreme Toxic Disposition

Yennda had a very simple thought process after he failed in the past. He didn't wish to become the strongest or anything. Honestly, he knew that was impossible after seeing how the rest of the reincarnates fared. He was outclassed in that department.

He then got to thinking. What were his strengths? Why exactly was he one of the reincarnates? What path should he tread upon?

As he pondered upon such questions, Yennda thought of Earth, pondering about what made humanity afraid the most there. Gun? No. Shark? No. Knife? Nada.

They were all scary in situational context, but there was one that consistently set pangs of despair in the hearts of anyone who faced it.

Cancer!

Your body stops functioning normally and mutates uncontrollably. Unbearable pain follows suit. And honestly, it was a death sentence. Some could be treated at an early stage, but there was no guarantee. A single cancer cell needs to survive for that shit to relapse.