The Boomer 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 Boomer Core can only be obtained from the Boomers as an uncommon drop.
In appearance, it is described as a mechanical plastic core used by the Boomer. The Boomer Core appears to be fatter and cubic-shaped than the Spiker Core, a smaller cubic-shaped core. Its 'wings' are shorter than the ones seen from the Spiker Core's appearance and possess a different patterned design that wraps around the sides of the core.
The Boomer Core does not have any usages in-game that will benefit the players, other than to be sold to a selling vendor at a selling price of 30,000 gold.
- It is not to be confused with the Spiker Core.