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Minions have 5% increased Attack Speed
Minions have 5% increased Cast Speed
Minions have 10% increased Movement Speed
Minions have 10% chance to gain Onslaught for 4 seconds on Kill 
Ravenous Horde is a notable passive skill that grants increased damage, increased cast speed, increased attack speed, increased movement speed for minions, as well as a chance for minions to gain the onslaught buff on kill.