Temporary skill boost

A temporary skill boost is anything caused by an item, Summoning familiar, or action that temporarily raises a player's level in one or more skills. It allows the player to do things above their current level. For example, a Magic potion, which boosts a player's Magic level by five, will let the player cast High alchemy (which requires 55 Magic) with a Magic level of 50 to 55.

Temporary boosts do not stack - for example, a dwarven stout provides +1 mining and smithing, and a mature dwarven stout provides +2 to the same skills; using them together will not produce +3, but +2, as that is the maximum boost.

Boosts decay back to the player's base level at a rate of approximately 1 level per minute. It should be noted that unlike most other effects skill changes do decay while banking.

Uses

 * Entering a guild that requires a certain skill level, such as drinking a dwarven stout to enter the Mining Guild. Note: this does not work for the Warriors' Guild.
 * Doing an action that requires a higher level than the player is currently at, such as using a Fishing potion to fish sharks.
 * Meeting the skill requirements of some quests, such as While Guthix Sleeps. Players should note that temporary boosts do not work on all quests.
 * Performing tasks.
 * Investigating ancient effigies.
 * Note: the one-minute interval between stats decreasing by 1 towards their normal level does not start when you use the boost, it happens at a fixed interval set by the game. This means that you may only experience a few seconds of the maximum boost. Exercise caution if using the maximum possible boost from an item for a quest or achievement.

Items that give temporary boosts

 * Potions, such as the Hunter potion which boosts a player's Hunter level by three.
 * Food, such as the Garden pie which boosts a player's Farming level by three.
 * Drinks, such as the Wizard's mind bomb which boosts a player's Magic level by two or three depending on the player's Magic level.
 * Summoning scrolls, such as the Tireless Run scroll which boosts a player's Agility level by two.
 * Spicy stews - can only be accessed with completion of Evil Dave's section in the quest Recipe for Disaster. These are random and can boost OR lower a skill by up to six.
 * Crystal saw, which provides an invisible boost of three to a player's Construction level. It allows players to build items as if their Construction level was three levels higher; this is an invisible boost and so can be used in conjunction with tea or stews.
 * Capes of Accomplishment boost the corresponding skill level to 100/99 when the cape is equipped or operated. Prayer and Constitution skillcapes have a cool down period of 1 minute.

Invisible boosts
These boosts are not visible on the player's statistics screen, and most of them cannot allow a player to perform activities above his or her base level (an exception is the Crystal saw). Most invisible boosts are provided by Summoning familiars. For example, a Granite lobster provides an invisible Fishing boost of four levels, but does not allow a player with 72 Fishing to catch sharks, which require 76 Fishing; instead it allows the player to catch fish with the same speed as if he or she were four levels higher.

List of temporary boosts

 * Notes
 * A percentage boost is always rounded down, with exception of the mud bath and chef's delight, which are rounded up.
 * A reduction of x or more levels means the actual amount reduced depends on the player's level in the skills listed.

Temporäre Fertigkeits-Steigerung / Boost