The Spiker Core is a 'monster drop' that was introduced during the Ratboy's Nightmare Update. It is one of the many collectibles that are needed by the players in order to complete the entries of the Itempedia of the Nightmare. The Spiker Core can only be obtained from the Spikers as an uncommon drop.
In appearance, it is described as an oddly-shaped mechanical toy with a buzzing widget that fuels the living-bomb (Spiker) with unstable power. The living-bomb resemble similar appearances to the body of a bumblebee and possess black mechanical wings seen on the sides of the body.
Players may trade in the Spiker Core to the Gargoyle while making a deal with the NPC, which is collectively known as the Gargoyle's Deals. However, this can only be traded in if and only the deal is available throughout the servers, as one deal can only appear each real-life day.
- It is not to be confused with the Boomer Core.