Omega-1 Nanite

The Omega-1 Nanite (also known as the Control Nanite) is a large silver nanite that was injected into Rex by Dr. Rylander as a "present." When Rex asked Rylander what he had injected him with, Dr. Rylander replied that he had injected him with "everything". The Control Nanite, as its name implies, controls the active nanites in Rex's body and also appears to be the nanite responsible for Rex's new machines. wgAfterContentAndJS.push(function {if (window.showTocToggle) { window.tocShowText = "show"; window.tocHideText = "hide"; showTocToggle; } });

The Swarm
The Omega-1 Nanite automatically revived Rex's heart, thus saving his life.Added by Flickfreak

When Rex almost drowned in a river, the Omega-1 Nanite restarted Rex's heart, implying that it might help his body when he is in grave danger.

Alliance
Circe revealed to Rex that Van Kleiss, despite having Rex's nanites at his disposal, was still after Rex, presumably trying to figure out how he had regained his original powers as well as his new ones. Circe also revealed that she had heard Van Kleiss say that Rex had something that was "the key to everything". This could be a reference to the Control Nanite, as Dr. Rylander had said it contained "everything".

The Omega-1 Nanite deep inside Rex's blood vesselAdded by Flickfreak

Written in Sand
Van Kleiss later revealed to Rex that the Omega-1 Nanite has a self-replicating program which allows it to create new nanites if necessary. This particular function is later seen when Rex battled Quarry in Hong Kong.undefinedThe Omega-1 Nanite constantly supplied Rex with more and more active nanites every time they were disintegrated within his system. It also seemed to act on its own accord whenever Rex's life was endangered, summoning the right kinds of new machines depending on the situation.