Re: Rune words: ryhme
You can't find a flail that doesn't say "50% damage to undead". It's an auto mod, just like amazons bow have +skills and orbs have mana or life.
It's not an automod. Automods are things like bonuses to skill trees on amazon bows or javalins, res or ar/%ed on paladin shields, life/mana on orbs etc. For the sake of completeness: Staffmods are bonuses to single skills on wands, orbs, staves, scepters, orbs and barb or druid helms(I might have forgotten something here). Orbs can have staffmods and automods at the same time.
All mace class (including scepters) and staff class weapons have a 50%ed bonus to demons, it's an inherent bonus. HotO will work on a nonmagical flail. Not on scepters or any kind of maces BTW, as with respect to runewords, the term "mace" is a bit tighter. It won't work on a war hammer, for example.