When Rowan returned from the realm of Death, he brought with him all the energies from that hollow realm, and he could have easily rid himself of the corruption of Death when he returned, but due to three critical reasons, he did not allow himself to fully recover.
Rowan had discovered that with so much essence of death inside his body, it was hard for anyone to determine that he was still alive. His presence had been completely suppressed, and it was nearly impossible for even those near him to detect him when to their senses he was a mass of un-life.
If there were any Primordials checking for his death through the threads of Fate and Destiny, they would not be able to find him unless he gave them his location. Rowan knew that the Primordials understood that he was not dead. In the end, their infighting and innate arrogance had given him a chance to push for more than they could expect, and Rowan would make sure they paid for it.
