Ulf the Quarrelsome cut open his belly, and led him round and round the trunk of a tree, and so wound all his entrails out of him, and he did not die before they were all drawn out of him. From Njal's Saga, Ulf kills Brodir in revenge for the death of Brian Boru.
Strictly speaking, Ulf is a Legend of the Viking Age. As such he is may not be a Warlord. Infact he can only be taken in an Irish Warband lead by Brian Boru. Ulf's full rules are in SAGA Age of Vikings. There is of course, no reason why you should not use this model to represent your own Irish Warlord!