After the Magic Wars and Black Dawn, Blok left the Legion and retreated from the humanoid world. He became depressed. It was in this condition that Roxxas found him. In ordinary circumstances Blok may have been slow, but he was not an easy target. His severe depression meant that Roxxas had an easy time killing him.
Roxxas sent Blok’s remains to Winath: a sick joke rather than any form of honour. But the Legion always remembered their heroes, and they commemorated Blok with the same respect they afforded their other dead colleagues: a memorial on Shanghalla.