With the highest health of any boss in the wing - accounting for armor - Lady Deathwhisper comes with 90 armor and 30 health (120 total effective). Her Hero Power, , damages all enemy minions at the start of her turn down to (1) health.
Players are provided a card to combat this, , a dragon minion with 30 attack that can only be used if it is undamaged; it is on the board damaged. This means players need to use a class that has adequate healing, such as the Priest, Paladin, Druid, or Shaman.
- See this subject on WoWWiki: Lady Deathwhisper