the scorched brain is indeed for a quest. there's a named goblin (im KOS to him) that spawns very close to Xaon Bulzekel ( http://eqbeastiary.allakhazam.com/search.shtml?id=12742 ). Name starts with a K...Im thinking its something like Kilian or something along those lines...if he speaks with you, he'll tell a story of some goblins that ate some bad flesh and it burned their minds, these goblins were outcasted, but still live in the caverns and they had killed his brother. He's asking revenge on these brain scorched gobbies, and wants 4 scorched brains as proof of your exacting his revenge. turn them in for an item.
My group had to evac/succor quite a bit to evade trains, and this happened 3 days ago, so the quest/npc goblin name are a bit foggy to me, I'm going to huhg a group and get more data on the scorched brain quest though..
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Tidykat Leondegrance <Cohort Chalybeius> Cazic-Thule Server 66th Shadowed Prophet
the goblin Kiliki and the kobold Hunter Gotg (or something like that, sorry I don't remember the name, just that is was Hunter ___) both offer a quest for 4 brain-scorched goblin heads. (kos to both <but they are quest mobs, so won't agro>, but used sneak to talk to them to get the quest info)...only saw 1 brain-scorched goblin, so no clue what the reward is yet. I'd assume the rewards are similar, the difference being which group gets the +faction and which gets -faction
I did this quest not long ago. Quest sucks :(. You get a no rent neck item from Kiliki, buts its pretty decent stats. Like 5ac 4wis 10sta 5hp 25m 25mr effect: elemental blanket or something(circle of winter/summer is better).