On the surface Invincible is merely a tribute everything colorful and innocently unique about superheroes. And while that's mostly true, when a battle gets serious in the series, the fights rival Mortal Kombat in their gore. Title character Invincible is the top hero of his world, right wrongs like a young Superman, but as the series continues he faces threats bigger than your average bank robbers. When Invincible faces world-threatening bad guys, both sides go all out with insanely viscous fistfights. Broken limbs, decapitations, exposed organs, nothing is off limits and the shift between the colorful adventures and savage beatings makes the use of violence even more shocking.