Blight is a giant green blob like-creature that attacks Prexxor Chasm. When Tom went to Prexxor Chasm for the first time, he found Smildon, a creature from the chasm. Smildon told about this mysterious thing (also full name Blight), and Tom left the chasm before he could see it.
Later in the drome, Tom fought Peyton, using his Prexxor Chasm scan. During the battle between Arias and Vinta, Blight appeared and defeated Vinta. After the shocking battle, Tom promised that someday he will destroy Blight and save the Prexxor Chasm. Garv, the caretaker of Lake Morn, made a medicine to defeat Blight and proving that it was, in fact, a disease.