Origin

Jack Crow was known as the Indian Trapper and lived alone in the woods of Stone Lake, Manitoba. It was there he first encountered creatures of the Rot. They burned him alive and as Jack ran into the swamp the Green took him in and transformed him into their new Swamp Thing.

Creation

Old Jack Crow was created by writer Jeff Lemire and penciller Timothy Green II.

Major Story Arcs

Endless Rot

As Jacob Mullin is attacked by the Rot, Swamp Thing, Old Jack Crow, saves him and returns him to the safety of his home. Once Jacob recovers, Jack grows a plant, tears it off and feeds it to Jacob which explains to him how he came to be and his role in the balance between the Red, the Green and the Rot. Jacob panics and flees back to his hometown and family however once he arrives most of them have been transformed by the Rot. Jack erupts from the ground with massive vines and saves Jacob again. Jacob finds his son and some townspeople hiding in a church as the Rot begins to mass before them. Led by the Hunters Two, the Rot face off against Swamp Thing and Jacob as the new Animal Man. Swamp Thing and Animal Man defeat the Rot. Later at the graves of Jacobs wife and daughter, Jack grows beautiful flowers on their headstones. 

To Monsters

Old Jack Crow finds a little girl lost in a deep snowstorm and alone near his cabin deep in the woods of Manitoba, Canada, so he takes her in until she recuperates. She came all the way to find the "green man". Old Jack Crow is told of the horrific cold that is killing everything slowly, but instead of the little girl wanting it to stop, her true form is revealed as Anton Arcane grotesquely bursts out of her skin. In the surprise, the Swamp Thing doesn't manage to put up a decent fight before Arcane bites his head off, killing him instantly. Arcane recalls how that particular Swamp Thing was not "the first avatar of the Green or the Red that I have killed, but his death was most enjoyable..."