The Pacifier

The Pacifier is a very slow two-handed mace that provides bonuses to strength and stamina.

Source
The mace drops off Lo'Grosh in Alterac Mountains.

Notes and trivia

 * This weapon is one of only three items with a slow speed of 4.00.
 * The large damage and slow speed of this weapon enables warriors, paladins, and Enhancement speced shaman to deal very high burst damage.
 * The Pacifier is currently the slowest two-hand mace and slowest type of mace in-game.