A massive iron golem, Bosh was found sunken in the dark sludge of the Mephidross swamps. Once freed, Bosh had no memory and chose to accompany Glissa and Slobad. By their side, he searches Mirrodin for any details of his past along the way.
As Glissa searches for the truth about Memnarch, Bosh searches to unearth the secrets of his past buried deep in his memory. Just like Glissa, he's seeking the truth, but his truth is his own lost memory, and an understanding of his place in a world he no longer recognizes.