Plague = -str, as well as poison.
Being a dwarf, he is resistant to both, but there are still a chance to do it. Plagued berserker = dead meat, you only had to land it once, then retreat, then come back to energy drain his moves. Eventually, he would run out of mana/moves. If he was withered, it's very likely that with the plague he would drop his weapons. Also, plague stacks and I belie