Q1: Why didn't Thragg simply fly away from the sun?
A1: Mark Grayson locked Thragg into a grapple using all his strength, preventing him from building momentum. In deep gravitational wells like the sun, escape velocity requires substantial uninterrupted thrust, which Thragg could not generate while fighting off Mark's grip.
Q2: How did Mark survive the heat when Thragg burned to ash?
A2: Mark did not walk away unharmed; his skin and organs burned almost completely away. However, Mark held Thragg deeper into the solar surface, forcing Thragg to absorb the brunt of the heat before Allen the Alien used Coalition tech to pull Mark out at the final second. Atom Eve's subconscious reality-warping subsequently restored his destroyed body.
Q3: What happened to Thragg's children after his death?
A3: Led by Ursaal, Thragg's hybrid Thraxan children abandoned their father's imperial conquest. Mark Grayson granted them asylum, and they eventually integrated into civilian life across Coalition worlds, helping rebuild the galaxy instead of conquering it.
Q4: In what comic issue does Mark kill Thragg?
A4: The fight reaches its fatal climax in Invincible #140, written by Robert Kirkman and illustrated by Ryan Ottley, published by Image Comics as part of "The End of All Things" story arc.