Edited to add how he died and who was involved as well as what injuries he sufffered. Here's what's been added
It had not been too long ago that he had been "killed". His demise came from the hands of someone that he taught a very long time ago, Sierra 'Strings' Marston. As his own student started to loathe her mentor and notice the faults in his old ways, she grew to believe that the only way to help people then would have been through his death. Though she did not know that Elias felt the same way about her, believing he had been mistaken thinking that it was a good idea to train her. She was too stubborn and too willing to react violently to solve problems. These things inevitably led to them fighting one another one fatefull day by the very lake where he was now burried. Both recieved multiple stab wounds through the fight, and at one point it seemed like Sierra had finally beaten her mentor... That is untill Elias turned things on her. She always carried a vial of a highly explosive concoction made by Jessie Calverne for her, wich he knew would explode if he so much as took the cap... Thing that he did once he got close enough to her. The explosion wasn't a debris filled explosion, but it was strong enough to break his ribs and do significant internal damage. While Sierra was able to somehow walk away from the blast badly hurt. Elias was left for dead, coughing up his own blood as his internal organs failed him. The Stalker was no more. His sister Joanna Sinbow hastily burried him out of deep respect. Creating a small coffin for him out of the nearby planks of wood in the encampent by the lake.
Tragic events that led to his death... Tragic events that these vortigaunts were now willing to fix in a way that no human could even think imaginable