Poison

"You really are an annoying pest!" Fatty Boba bellowed when he smashed his enlarged green arm down on Dilan.

"I can only return that, you lump of fat!" Dilan shouted, deflecting the attack with his sword. He twisted his body and moved with the flow to avoid the attack without sustaining any injuries that could decrease his combat prowess.

With a small spin around his own axis, Dilan ended up in a position that allowed him to initiate a counterattack. This was exactly what he did. He shrouded his longsword in a destruction layer and exerted the first slash of the Destruction Sword Style while slashing the Troll's enlarged forearm.

Fatty Boba's huge body mass which was mostly all fat could be twisted and turned in whatever way the Troll wanted. He could enlarge his arms, legs, his neck, or even his most precious thing.

However, it was just a mass of fat that was enlarged and not the bones themselves.