In epic Magnus's bad seeds theme force he is allowed to take 'trencher units' for tier 1.
It then says 'These models are considered to be friendly mercenary models instead of Cygnar models, and can include attachments.'
So, he can take a unit of trencher commandos, which then become mercenary models.
Jonas Murdoch is a trencher unit attachment, that can only be attached to mercenary units.
So would Magnus be able to take him (does he fall under 'trencher units') and if so would he be able to attach him to the commandos?