Heroes of the Storm - Free Hero Rotation : January 5-12 ,2016

 

• Raynor
• Muradin
• Rehgar
• Anub'arak
• Thrall
• Azmodan
• Tyrande (Level 5)
• Sylvanas (Level 7)
• Leoric (Level 12)
• Nova (Level 15)

Source: http://eu.battle.net/heroes/en/forum/topic/13604571130?page=1