In search of perfect order and vengeance upon his enemies, Sinestro's power is fueled by fear. As a Blaster, Sinestro eliminates his enemies by spreading silence and fear to cull the weak.
A former mentor to Hal Jordan, he was once a renowned Green Lantern, praised by many. But when Jordan exposed Sinestro's use of oppression and fear to "create order," everything changed. Sinestro was put on trial and banished to the antimatter universe, where he found a new kind of power ring that channeled not Willpower, but Fear. In time, Sinestro would even come to control Parallax, the living embodiment of all fear.