Bonecrusher

The Bonecrusher is a reward from the Dungeoneering skill. It requires 21 Dungeoneering and 21 Prayer. It costs 34,000 tokens at the rewards trader and is for members only.

This means, a Dungeoneering level of at least 62 is required for the tokens needed when using the regular way of dungeoneering you could also gain tokens by completing Sagas but then you'll still need a higher level than 21 in order to do it effectively however it is possible to acquire the necessary tokens by completing the saga "Three's Company" over and over but this is incredibly slow.

When a player has a Bonecrusher present in his or her inventory, all bones dropped by monster kills, or obtained from hunting, will be automatically converted into Prayer experience. It should be noted that the Bonecrusher does not have any effect on ashes dropped from demonic beings.

There is no way to replace a lost Dungeoneering reward except to earn more tokens and purchase a new one. It is recommended that such items as the Bonecrusher be used only when a player can be certain his/her character will not die or unless the bonecrusher is not a risked item.

Uses
The item needs only to be kept in the player's inventory for it to take effect and may be found useful if players have a tendency to leave bones on the ground and not bury them. When a monster is killed with a Bonecrusher in the player's inventory, Prayer experience is rewarded in a way similar to Slayer experience (with bones missing from the drops), with no animation or anything similar occurring.

This means that this item won't slow players down at all compared to leaving bones on the ground. The Bonecrusher has no effect on drops when it is left in the bank and will not work if LootShare or CoinShare is active.

If a monster drops more than one bone, such as bloodvelds or jogres often do, all dropped bones that are the same type as the ones the monster drops as remains will be converted to prayer experience; the rest will appear on the ground as usual, as a separate drop. Also, long or curved bones will not be buried by the bonecrusher, as these are a separate drop too.

The Bonecrusher can be used together with the twisted bird necklace, split dragontooth necklace, or demon horn necklace to regain prayer points.

Trivia

 * The Bonecrusher used to cost 110,000 Dungeoneering Tokens before the 21 April 2010 update.
 * Although it requires level 21 Dungeoneering to use, it is impossible to obtain a Bonecrusher at this level. The first level at which players can get the bonecrusher is level 62 (If using the regular way to obtain tokens), because this is when 340,000 experience is achieved (34,000 tokens).
 * During the weekend of 12 November to 14 November 2011, there was a bug where Bonecrusher would not process bones dropped by monsters in the Chaos Tunnels, whose drops were doubled as part of an event.
 * There is currently a glitch where sometimes Bonecrusher does not crush bones. This glitch has not been fixed.
 * The Bonecrusher does not work on Demonic ashes

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