The primary element within the phrase, the word describing a tool for estimations, functions as a noun. This tool is specifically designed for the context of Old School RuneScape (OSRS), facilitating calculations related to fragments of bone. As an example, this tool can estimate the number of bone fragments needed to reach a particular experience level in Prayer or the cost associated with obtaining those fragments from a specific source within the game.
These estimation tools are significant because they allow players to efficiently plan training strategies within the game. By accurately forecasting resource requirements and associated costs, players can optimize their time and in-game currency expenditure. Historically, players relied on manual calculations or rudimentary spreadsheets; specialized tools offer improved accuracy and ease of use.