Threat of Thassarian is a passive death knight ability learned at level 74 for death knights with the frost specialization. This is a key talent that makes dual wielding viable for death knights. Normally only the main hand weapon is taken in to account for abilities that deal damage based on weapon damage, such as Blood Strike and Obliterate, severely reducing their damage when dual wielding instead of using a 2-hander. This talent 'fixes' that problem for deep frost death knights.