Heroes of the Storm - Free to play Hero Rotation from 1. March until 7. March

 

• Li Li
• E.T.C.
• Jaina
• Gazlowe
• Artanis
• The Butche
• Uther (Slot unlocked at Player Level 5)
• Thrall (Slot unlocked at Player Level 7)
• Azmodan (Slot unlocked at Player Level 12)
• Nova (Slot unlocked at Player Level 15)

Source