It is said that the evolution of life in Sumbios is abnormally fast-paced. It is eventually proved when Akaphos emerged from a tiny ball of sludge, the size of a human fist became a gigantic and indestructible sludgeborn monster. With his continuous growth, he challenged other sludgeborn monsters and wins every single time. When a monster is defeated by Akaphos, he consumes it, adding more strength and black sludge to his vitality.
AKAPHOS became known and feared by thousands of sludgeborns as he continues to roam the western part of Sumbios like his brother. AKAPHOS can be seen as a huge monster with a lot lower torso. He uses this advantage to stomp and devour his challengers, remaining undefeated.