The preparation instructions for a consumable item that grants the user an additional opportunity to act outside of their normal turn. This allows for a tactical advantage, enabling a character to perform an extra action, such as attacking, defending, or using a skill, in a single round of combat or during a time-sensitive situation. For instance, a fighter might drink such a concoction to make an additional attack, or a rogue could use it to disarm a trap before being detected.
The creation and use of such items hold significant value due to their impact on strategic decision-making and overall effectiveness. Historically, these items have been sought after by adventurers, strategists, and anyone seeking to overcome challenges requiring swift and decisive action. These were usually prepared in ancient alchemy lab or specialized facilities. The historical contexts indicate the desire for instantaneous capabilities in the characters.