# Boosters Ahead of the race, players can pick and buy a **booster (Energy Drink)** and/or a **distraction** for the rival CAThlete **(Laser Pen)**, which *increases the chances* for success and may actually decide the outcome of the race. The price of one booster (purchased separately and for one-time use) **depends on the League**. * **Energy Drink** is applied automatically (if purchased) at the beginning of a race and allocates stat boost percentage *(ranging from 3% to 20%)* at random among the three stats. * **Laser Pen** is applied at the end of the race (if purchased) and reduces a rival’s total score by a random percentage from 3% to 20%. {% hint style="info" %} [Rainbow-eyed CAThletes](/cathletes/rainbow-eyed-cathletes.md) enjoy DOUBLE laser debuff against their rivals in Duels. {% endhint %} * **Mysberry booster** (the random stat boost provided by Mysberries) also works in Duels the same way it does in PvE Competitions.

Please note that the screenshots are for illustrative purposes only, and the numbers (rewards, costs, etc.) on them may differ from the final balance configuration. You may always find the valid information in the Walken app.

Summing up, in Duels you have an opportunity to *maximize your chances* for winning with the help of ***Energy Drink***, ***Laser Pen,*** and the good old ***Mysberry Booster*** (which applies automatically, with no extra payment required). Don’t forget to pick one booster or both ***before the race begins***! Your opponent may also use boosters, and you’ll see if they do so in the course of a race. The bigger point though is that the PvP mode is designed in a way that gives players greater *control* over their CAThletes’ performance. However, it is still not 100% predictable and predefined: since there’s an **element of luck** as to the ***random selection of the discipline, your rival, and booster application*****,** stronger CAThletes’ advantage does not guarantee them wins in all duels, and not so strong CAThletes can win. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.walken.io/pvp-duels/boosters.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.