It is said that the evolution of life in Sumbios is abnormally fast-paced. It is eventually proved when Gral 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 Gral, he consumes it, adding more strength and black sludge to his vitality.
Gral became known and feared by thousands of sludgeborns as he continues to roam the western part of Sumbios. Gral can be seen as a huge monster with no lower torso but don’t be deceived by his lack of parts as he can command his body to grow into a size of a mountain and harden his skin to the point of being indestructible. He uses this advantage to stomp and devour his challengers, remaining undefeated.