|Description||Tendril production in the cerebral cavities begins. Enables increased control over host brain|
|Previous symptom||Santa's Little Neurax Worm|
|Next symptom||Digital Elf, Contentedness, Laughter, Friendship, Sloth, Indulgence, Gift Planes|
Festive Tendrils is a tier 2 symptom exclusive to the Christmas-themed Santa's Little Helper scenario. It is the equivalent of the Cerebral Tendrils symptom in the basic Neurax Worm expansion pack. It allows the Neurax Worm to breach the cerebral cavities and grow further into the brain.