Ernest St Ives was a French soldier in the first World War when he fell into a trench and was mustard gas flowed in. When Death came to take St Ives, he refused to go and Death did not take him. Death left a parting gift that St Ives discovered when another soldier came to his aid. The moment that St Ives touched him, the soldier fell, dead. St Ives now killed whomever he touched with his skin. He sadly killed his wife by merely hugging her.
St Ives eventualy realized that he was immortal and he began to enjoy his power. He amassed a rather powerful base by the time that he moved to Quebec. There, he became a powerful criminal with no interference until he killed Raymonde Belmonde, an old friend of Northstar's and took Aurora captive. Norhstar stormed Deadly Ernest's home only to be knocked out when he saw Aurora flirting with him. When he awoke, he was met by the blade of Nemesis. She was sworn to slay him and apparently did so by cutting him into several piecees.
St Ives was still not taken by Death. Instead, his remains were taken to the same Montreal hospital that housed Scramble. Scramble put Deadly Ernest's body back together and he returned to life. Alpha was finally able to beat him, again with the help of Nemesis. His body was seemingly completely destroyed so it is unlikely that he could come back once again.