"TK still needs brains. Apparently a lot of them."
Get TK a boatload of brains to eat.
The objective is to kill zombies with head shots, collect 100 of the brains that fall, and return them to Zombie TK Baha.
"You gave him a bunch of brains. He appears to be coughing up an item..."
"Braaaaaaaaaaaains", that's spelled with 12 'a's, is all TK can talk about.
As long as a player stays in a zone, the brains that drop from zombies will remain on the ground until picked up. Therefore, if a player has completed the mission, with characters in Hallow's End, the extra brains can be left on the ground for the next Brains mission.
After the mission is turned in, TK will eat a brain and vomit up an item, such as a weapon, class mod or an artifact