In 2011, Jared Shealey (The Helm, Heiress) and Jesse Roberts (Sandrider, The Ruby Doe) started writing music with original drummer Brandon Ramses. Their goal was simple: get loud, get heavy, and get weird. Later that year, Old Iron recorded their first full-length album, Cordyceps (2012), in Jesse's basement. Soon afterwards, current drummer Trent McIntyre joined their ranks.

With Trent in the equation, a second album began to come into focus. Old Iron would go on to record Lupus Metallorum at The Red Room in Seattle, with veteran Matt Bayles (Mastodon, Botch) at the engineering helm, releasing it on Good To Die Records in 2016.

The trio has weaved sprawling psychedelic sludge tapestries ever since.