Improved Mortal Strike

From wow.incgamers.com

Talent: Improved Mortal Strike
Effect: Reduces the cooldown of your Mortal Strike ability and increases the damage it causes by a %.
Statistics: Rank 1 = +1% damage, Rank 2 = +2% damage and -0.4 sec Cooldown, Rank 3 = +3% damage and -0.6 sec Cooldown , Rank 4 = +4% damage and -0.8 sec Cooldown, Rank 5 = +5% damage and -1 sec Cooldown.