Destroy organic items

Destroy organic items is a spell solely usable while the Mephitic spellbook is open. This spell can only be cast on items with organic properties, eg, fish, herbs, food, etc.

When the spell is cast, which will function similarly to alchemy wherein the spell will flip to the inventory for an item to be selected, the option screen for how many items you would like to destroy will come up (similar to when cooking), the options are 1, 5, 10 or X. When an item is destroyed with this spell, there is no way to get it back, nor will you get any remains, it will simply disappear from your inventory.

The spell can only 'target' one type of organic item. If a player were to be fishing tuna and lobsters, the spell would only destroy the type of fish which was initially selected.

Usage
This spell can be extremely handy, if you are fairly rich, for getting your fishing to 99, as fish in an inventory (-3 spots for the runes and the rod) can simply be destroyed using the spell. This becomes quite an expensive method, though it is probably the best way to get 99 Fishing, if funds are not a concern.

Another use of the spell which can be useful when fishing is when a player wishes to only bank one type of fish. When spearfishing for sharks, the player can use the spell on the swordfish that end up in his or her inventory, ensuring that only sharks are banked, facilitating more efficient means of moneymaking/ acquiring food.

Trivia

 * For some reason, it does not work on logs. Probably because Jagex only restricted this excellent training method to one skill (Fishing).
 * This spell originally only required 1 nature rune, but was changed to 2, as the spell was regarded as unreasonably cheap given its skilling potential.
 * Interestingly, the spell cannot be used on burnt fish.