On January 10th 2019, the 'Black Long' could be won in a AJHQ live stream. It can be won as a random prize in The Forgotten Desert. Many Jammers refer to this item as the 'Spike' or 'Rare Spike' instead of its actual name. The 'Long' Rare Spiked Collar was originally named Spikey Necklace.
Black Long collars are very wanted, one time I was VERY close to getting one but then I under traded a long collar that  I was going to trade and add for the black : ( So here are some fair trades-
Tiki mask (Not Blue or Green and Red) and matching bad long- Black Long
Blue Long, Red Long, and a long wrist- Black Long
Red Long and Purple Long- Black Long
Orange Long, Green Long, and Yellow and Pink Long- Black Long
Non Rare headdress, – Black Long
7 Short (Good colors) collars- Black Long
Neon bow, Yellow Long, Blue Long, and Purple Long- Black Long
Animal Jam Black Long Wrist
Now you know what’s fair for it! Lol! 😀