Is it true that the only units that can perform a Breakthrough reaction are Feral and Frenzied units? Section 6.20.9.6.1 states “…it also becomes a Triumphant unit and may be able to perform a Breakthrough reaction or linked Reform action after all of their Attack actions are resolved. “ Following t...

Thanks HughB, that's what if figured. I was hoping I was missing something in the rules that would allow the Jotunn in more than just one circumstance.

I would like to muster a jotunn but it appears that the only combination of units that will fit his authority is:

Commander: troll konungr(authority 81)
Mustered Command: 1 unit of leiptrolls(authority 16), 1 jotunn(authority 61).

Is this correct?

Thanks in advance,
Bryan