The Collaborative International Dictionary of English v.0.48:
Balefulness \Bale"ful*ness\, n. The quality or state of being baleful. [1913 Webster]WordNet (r) 3.0 (2006):
balefulness n 1: the quality or nature of being harmful or evil [syn: maleficence, mischief, balefulness] [ant: beneficence]