Thrall, warchief of the Horde, was contacted by the Prophet in his dreams.
The Prophet:"The sands of time have run out, son of Durotan... The cries of war echo upon the winds... The remnants of the past scar the land" (we see a little crow trying to peck out some food from the ground)"Wich besieged once again... by conflict...(we see Orcish Horde runnig down the hill with noise and war cries, crow has flown away and an orcish catapult floped down then we see orcish army running down the hill once again, after that we see opposite hill - human army runs down it)"Heroes arise leading their brethren to battle... As mortal army rush towards ther doom...the burning shadow comes to consume us all!(Infernals begin to fall from the sky, seconds after we see Medivh standing under a heavy rain)"You must rally the horde and lead your people to their destiny!"(Thrall awakens, cinematic ends)