Weaken Resistance to
All undead units, and only undead units, have a weakness to HOLY. This weakness cause a -50% Damage Resistance penalty to the combined (averaged) resistance of undead units against any attack with a HOLY type. Example: ignoring HOLY resistance boosts, wraiths have a (0 - 50 = -50)% resist against pure HOLY attacks, but a ((0 + 40)/2 - 50 = -30)% resist against HOLY RANGED attacks.