Ive still got my fangs from the halloween event and i dont know if the devs/admins will do with them either remove them or find some other use but if they dont find much use please be able to sell them in the market! It wouldnt have to sell for much as most players have 1000's of them but something like that. However if the devs/admins are finding use please make it a good one! Thanks!
The fangs will be removed from your account on Monday. They serve no purpose other than to earn you a reward.