Fires a relatively low-energy blast that sets an inhabited island on fire

Krillin smiled again at the thought, but something caught in the back of his mind. It was barely a tingle, but it rose rapidly, bubbling to the surface over the rush of emotion he was feeling. A sense of foreboding...panic swelled in his chest.

He spun around, only to see a bright crimson fireball filling his vision. His aura burst to life instinctively and he blasted off the ground just as the attack impacted, immediately incinerating the earth beneath him with a blinding flash.

- Bringer of Death Chapter 49

Heat. Searing, burning, heat.

Krillin forced his aura to its maximum extent, but it still only barely insulated him from the roaring inferno. It felt as if he was roasting alive. As he continued to release all his energy, pushing himself higher in an attempt to escape the raging firestorm, he could hear screams of terror all around. A sick feeling grew in his chest as he felt the faint ki signatures of the helpless humans around him disappearing, their anguish cutting like a knife as they were turned to ash in mere moments.

...

Clearly, Cell must have planned for this. By igniting the entire island in one fiery yet relatively low-energy blast, he had aimed to force one or both of them to the air, where he could pick them off at his leisure. Krillin's vision began swimming; he couldn't hold his breath much longer.

- Bringer of Death Chapter 51