Paradox Brothers: Guardian of the Gate is an event in Duel Links to unlock the Paradox Brothers. It is similar to the other unlockable character events, collect Maze Keys by dueling the duelists that appear in your duel world to duel Paradox Brothers at the gate and get event points to get exclusive rewards.
What makes this event different than the others is the choosing of a door. The Paradox Brothers will sometimes appear in your duel world, asking you which door you want to choose from 2 different doors. One leads to a high level of 50/40 with an added bonus to score, but also comes with a decrease if you lose the duel.
Collect Maze Keys by winning duels against Standard Duelists, Legendary Duelists, and the Vagabond.
Challenge the Paradox Brothers at the Gate once you obtain required amount of Maze Keys.
Earn "Points" after duels against Paradox Brothers based on Duel Assessment to unlock them and get exclusive event rewards.
Required Maze Keys and acquired Points
The amount of event points that you get is not the Duel Assessment from dueling against the Paradox Brothers, it is instead a multiplication of that DA score depending on what level you are dueling.
Paradox Brother's Level
Required Maze Keys (QTY)
Note: DA = Duel Assessment
Paradox Brothers may spawn outside the gate, duelists may challenge them as they bring new challenges not just by having a LVL 50, but also challenges like "Smaller Monster Zone", "Smaller Trap/Spell Zone" "No Monster Effect Activation", etc, offering a higher score or duel assessment upon winning, but it can also decrease your score if you lose.
Event exclusive skill
Paradox Brothers in this event uses exclusive skills, which are different from what players can obtain when using them as playable characters.
At level 20, he will start the duel with Shadow Ghoul on the field.