GR translation: find some cold fire to hunker down by to sharpen his knife

[Mike Jing]

V752.4-11, P766.34-767.3   Submariner and his multilingual gang will run
into battery trouble. Plasticman will lose his way among the Imipolex
chains, and topologists all over the Zone will run out and stop payments on
his honorarium checks (“perfectly deformable,” indeed!). The Lone Ranger
will storm in at the head of a posse, rowels tearing blood from the
stallion’s white hide, to find his young friend, innocent Dan, swinging
from a tree limb by a broken neck. (Tonto, God willing, will put on the
ghost shirt and find some cold fire to hunker down by to sharpen his knife.)

What does "cold fire" mean here exactly?