Uses his slipstream to build up enough speed to hit a supergiant star so hard it causes a hypernova

Its name was Omega Cassiopeiae...a nugget of information buried somewhere within the memories he had inherited from one of the frost demons. Even here, more than a million miles distant from its flaming surface, the light was brilliantly blinding. The star was six times heavier than Earth's sun but over two thousand times more powerful. The intensity of its rays caused his pale green exoskeleton to glow vibrantly, light passing through his entire body.

...

Cell erupted out of the body of Omega, immediately opening a wide slipstream trail. A thousand times faster than light, he cut a path toward the edge of the local nebula and made a wide arc back toward the blue giant. He was gaining speed, gaining anger, gaining pure unadulterated power.

"NOW YOU SHALL FALL BEFORE THE MIGHT OF PERFECTION!"

Cell extended his fists forward, pouring every drop of his power into his flight. His aura, formerly golden like that of the Super Saiyans, was now pure blue like the star he was bearing down on. He saw the haze of space around him speeding by, asteroids and planets rushing past in faint streaks. Before him, looming ominously in the center of his vision, was Omega Cassiopeiae. Cell clenched his teeth and boldly dove straight toward its center.

He needed no energy attack...he needed nothing but his own overwhelming might. The star seemed to tremble before him, as if consumed with fear. He was solely driven by rage and pride, but his mind was clear; the feat he was attempting required unimaginable precision.

Were he to build up this much speed with the force of his ki alone, it would have taken him a thousand laps around the observable universe. But his warp flight made that unnecessary. An instant before he pierced the surface of the blue giant, he dropped out of his slipstream, slowing to just below the speed of light. Then he struck.

At just one hundred billion trillion trillionth less than lightspeed, his mass increased to greater than that of a gas giant. His kinetic energy was transferred to the foundations of Omega in an instant; the center of the star collapsed as if he was punching a hole through a donut. As he breached the other side, he pulled hyperspace back around him and shot out again into space, his body super-radiated with the light of the core. He was glowing with unimaginable energy, enough to incinerate moons or boil oceans. This was the kind of power he had dreamed of.

Cell finally stopped, turning to look behind him. The sight caught up with him only moments later; he saw the center of the star burst outward and then watched as the ring of stellar plasma began to implode, pregnant with his energy. Six seconds after his initial impact, the stellar core exploded in the most massive hypernova the universe would ever see.

His rage sated, he paused. He hadn't specifically come there to destroy the star, but it had fallen to pieces like paper before his furious wrath nonetheless. Curious, he wondered what other effects his sudden outburst would have. Was this system inhabited?

- Bringer of Death Chapter 55