Antaro Chronus is the most gifted of all the Ultramarines tank commanders. While most warriors dedicate to be the master of a particular vihicle, Chronus' abilities extend to almost any tank in the armoury of the Adeptus Astartes.
Sergeant Chronus was anointed as the 'Spear of Macragge' for his actions on Damnos and a hundred other worlds. 1