You were supposed to run up in time to kill the first hard-dicked goblin you see first, before it dies in its scripted sequence.

Then you can loot the sticky gobnut item, and if you interpret its lore correctly, you’d know that finishing the side quest where you find the lost canoe tribe would quell the hunger of the hard-dicked goblins, changing their world models and drops so you can’t craft the helmet recipe after that.

Duh. Git gud.