After Sauron fled to the east with his servants, leaving Dol Guldur unoccupied, the darkness that corrupted the forest of Mirkwood had finally lifted everything was about to turn green anytime. While Amy fled back to her world to get help, Gandalf and Radagast arrive at Rhosgobel.
"I need that horse!" Gandalf said hastily.
"What? Gandalf, where are you going?" Radagast asked.
"To warn Erebor." Gandalf replied and explained the entire situation to him. "They have no idea what is coming. I saw them with my own eyes - rank upon rank of Orcs of Dol Guldur. You must summon our friends, bird and beast - the battle for the mountain is about to begin."
"Wait!" Radagast called and walked over to him. He then passed his own staff to him. "Take this."
Gandalf felt pleased and gently took it from Radagast.
"If you what you say is true, then you'll need it more than I." Radagast said.
"Thank you." Gandalf replied and turned to mount on one of the horses.
A word of warning - it... can be a bit dicky sometimes." Radagast notified as he moved his hand around. "You just have to twiddle with the top. I expect you'll manage."