Bones To Bananas

Bones to Bananas turns all normal bones and big bones in your inventory into bananas, which heal 20 life points each. This spell can be used to stay fighting without having to use the bank for a long time; however, due to the relatively high cost of a nature rune, bones, and low healing ability of bananas, it is rarely used.

Some players use the spell to help train Summoning, since bananas are used in making Fruit bat pouches. It can be quicker to gather bones in places near banks where a lot of fighting occurs rather than going to Karamja (even by teleport) and picking bananas there.

When the spell first came out in 2001, it was called Bones to Bread and required no nature runes. However, Jagex changed it as it was considered to be too powerful at the time of release.

This spell may be transferred to a piece of soft clay at a lectern in the Study of a Player-owned house, creating a magic tablet. The same runes are required, as well as the magic level needed to cast the spell, and the magic experience is gained at the time the tablet is created. The default option is to 'Break' this tablet, which casts the spell, but does not give any experience.

Bones to Bananas can now be used to convert any bones up to and including big bones. This was introduced with the 17 November 2009 update.

Bones to Bananas costs coins for each cast,  coins if an earth supplying staff is wielded,  coins if a water supplying staff is wielded and  coins if a Mud staff is wielded.

The spell has 50% chance of not using any runes if a player completed hard Lumbridge and Draynor Tasks. The advantage lasts 10 times each day. The required runes don't have to be in inventory to cast it, if the effect does not activate, you will get the message that you are missing the runes, if it does, you will cast the spell.

Trivia

 * This is, in all probability, the spell which added to infamously unlucky pirate Unlucky Jenkins's resume of bad luck (It turned his ribs to bananas, which were promptly ripped out by monkeys).