Goblins are an entertaining bunch, and usually quelled easily - so most adventurers might believe. But give them time and ingenuity with someone's old armor, and you'll have yourself somethin' crazy indeed.
Enter Tek Metalmaw - a goblin with a decent amount of size, probably more than most of the bunch. As it happens, he had this exact situation occur, finding a dead man with his armor mostly crushed and destroyed by a few orcs who'd wandered through. He took what he could, chuckling with a malicious delight, and ran back to engineer for himself protection - and fashioned a very good (by goblin standards) set of metal armor. This brought too much attention, though, and he had to make his point known.
Once, a goblin tried to steal from Tek. Tek wasn't too pleased with the results, and with helmet attached, found the poor thief and bashed his skull in, for steel's harder than bone with impacts. Of course, he hurt his own head, but that's just the price to pay to secure what's yours. After all, nobody messes with Tek unless they want a fight. Nobody.
Now, after finding this heretic of words, the maker of letters, Tek could only laugh with his deep voice, lower-pitched than the rest of the gang. But this... 'secret' invitation? This meeting in the Moothouse? Suspicious, and Tek wasn't going in without his favorite helmet - the one with a metallic lower jaw attached as a faceguard, bolted in by his own hands.