In a massive chase around Knighton, the NEXO KNIGHTS attempt to keep the Book of Betrayal out of the Book of Monster’s grip. But the evil book is persistent. Will he get the final piece of his evil puzzle?

Forbidden Power missions are spawned on the map by the zap of Monstrox. See what happens when the knights take on Cosmic. Before starting the mission try out different Combo NEXO Powers to find the perfect one that can counter these Cosmic attacks.

Axl is the biggest NEXO KNIGHTS™ hero in the kingdom, but even he needs to power up to defeat evil! When he needs that extra charge on the battlefield, Axl summons The Hammer of Merlok. With this Merlok Power, a giant electric charged hammer falls from the sky in the middle of the screen, flattening enemies, and discharging a wave of golden electrical energy every 3 seconds that damages and paralyzes enemies!

Villagers are being enslaved to dig out three ancient warriors whom the Cloud of Monstrox wants to bring back to life. Can the NEXO KNIGHTS make their COMBO NEXO Powers work inside a mountain?

Never fear – Aaron is here! For this battle, Aaron is charging up and using The Sword of Merlok to help him beat these monsters! This Merlok Power creates a giant sword that falls and lands in the middle of the battlefield, causing huge cracks in the ground that deal area-of-effect damage to all enemies. Additionally, golden eggs fall from the sky, crushing enemies beneath them.

The Knights are tasked with protecting the King’s valuable Ned Knights comic book during the Bookingheim Knight-a-Con. But with all the costumed kids there, will they recognize the real Jestro and Book of Monsters coming to get them?

Clay has arrived to the battlefield ready to fight, but he needs some help! Watch him power up by summoning The Crossbow of Merlok with his shield. With this special Merlok Power, a mounted crossbow appears in the middle of the screen and shoots in a circular motion for 20 seconds, dealing area-of-effect damage. Every 3 seconds, the crossbow stops and then starts to rotate again in the opposite direction.

Macy is mad! The three Harpies have kidnapped her mom Queen Halbert. The NEXO KNIGHTS use everything in their power to rescue her. But is kidnapping the real plan or is the Cloud of Monstrox after something else?

The Cloud of Monstrox is growing more and more powerful with every Forbidden Power Jestro inserts. The capitol of Knighton is under attack. The Fortrex is damaged and Clay is turned to stone. Dark clouds are truly gathering over the realm.