Hestera Spikesap holding a bloodoak acorn.

"It's an acorn. But not just any old acorn, dearie. This here is a bloodoak acorn."
-Hestera Spikesap

Bloodoak acorns were huge, red, bulbous acorns which grew on bloodoaks. When powdered and roasted, bloodoak acorns could be used as the key ingredient in Oblivion. Extremely volatile when mixed with phraxdust and introduced to moisture, powdered bloodoak acorns were also used to fuel Vox's Baby.