XANA is the main antagonist of MRCL.
Like in Code Lyoko, XANA can activate Towers, launch attacks and create monsters in Virtual Worlds.
Monsters are hostile creatures (passive towards xanafied players) that appear in virtual worlds when a tower is activated. They can also spawn randomly near virtualized players.
Currently, there are only five kinds of monsters in the game but more are planned in the Monster Changelog.
Kankrelats are small, basic monsters that load and shoot one laser at a time. They are the weakest monsters.
Bloks are medium-sized monsters that shoot lasers. They spin before shooting.
For now, they only have one type of laser. In the future, they will be able to shoot ice beams and fire rings, as stated in the monster changelog.
Megatanks are big monsters that have two abilities. When they are closed, they can roll and run Lyokowarriors over, instantly devirtualizing them. When they are open, they can charge and shoot a laser beam that can devirtualize you in seconds.
The only way to defeat them is to attack them while they are open, as they're invulnerable while closed. This makes them the strongest monster.
Mantas are flying monsters that only appear in Sector Five and the Volcano Replika. They shoot lasers from the sky and they often come down to attack. They will also have the ability to release mines in the future.
These monsters are unaffected by Smoke Grab, Telekinesis, Petrification and Triangulation.
Creepers are monsters that only appear in Sector Five. They can attack Lyokowarriors with lasers, but they also have the ability to climb walls and follow you around Sector Five.
As of the Uncharted Territory update, XANA can attack Lyoko's Core in Sector Five.
When the attack is launched, monsters will spawn in the Core chamber and will start attacking the Core's shields. Once both shields are gone, the heart will be vulnerable. If it is destroyed, it will lead to a game over. (Lyoko will still be there once you come back)
Xanafied players can launch Core attacks by attacking it, which will spawn monsters in the chamber.
Tower attacks happen every 6 to 12 minutes. Different attacks have different requirements to be launched, one of them being the player amount needed.
If a return to the past is launched, the risk of XANA ignoring the player count when launching an attack goes up and goes down whenever an attack starts.
Currently, XANA can only have three tower attacks at the same time. Towers activated by xanafied players using Code XANA do not count towards this counter.
The Core module (not to be confused with Sector Five's Core attack) is integrated in ProjectCarthage, it adds one basic attack created by Jack.
It adds the following attack:
The activated tower launches a possession protocol and xanafies a player.
ProjectXANA is a module created by Sky that adds 8 attacks.
It adds the following attacks:
The activated tower launches multiple possession protocols equal to the amount of possessed players, which will xanafy 1/3 of online players.
The activated tower launches a software error protocol, which will make the scanners always virtualize you to Sector Five.
The software error protocol is temporary and will be replaced by software attacks in the future. (See the changelog)
The activated tower launches a software error protocol, which will make the scanners always virtualize you to a random sector.
The activated tower launches a factory connection protocol, which will break the elevator.
This attack will not be launched if no one is on Earth.
The activated tower launches a train control protocol, which will force a train transporting toxic chemicals to crash.
The activated tower launches a pylon overload protocol, which will overload an electric pylon that will release the energy once its capacity reaches 100% to blow up a nuclear plant.
Once the energy is released, the tower will automatically deactivate, allowing for a last minute return to the past to stop the nuclear plant from exploding if there are no other activated towers.
The activated tower launches a software error protocol, which will force a return to the past, allowing XANA to become stronger.
The tower will automatically deactivate after 5 returns to the past.
The activated tower launches a defense satellite protocol, which will deviate the trajectory of a meteorite to make it fall on the city.
This attack requires a return to the past to be launched once the tower is deactivated.
Phoenix is a module created by OscarKoala that currently adds 12 attacks.
This module is unique as it adds seasonal attacks that happen depending on the current season in France.
It adds the following attacks:
The activated tower launches a spectre protocol, which will summon a spectre of Sissi near the park's manhole at Kadic.
This attack will not be launched if no one is within a 200 block radius of the spectre's spawning location.
The activated tower launches a spectre protocol, which will summon a spectre of Jim near the boiler room's sewers entrance at Kadic.
This attack will not be launched if no one is within a 200 block radius of the spectre's spawning location.
The activated tower launches a gravity manipulation protocol, which will give players a levitation effect, dealing them fall damage once the effect wears off.
This attack will not be launched if no one is on Earth.
The activated tower launches a military satellite protocol, which will shoot powerful lasers at players that are not under cover.
This attack will not be launched if no one is on Earth.
The activated tower launches a music generation protocol, which will play a deadly music that will damage anyone that hears it.
This attack requires a return to the past to be launched once the tower is deactivated.
The activated tower launches a root control protocol, which will trap players standing on grass.
This attack will not be launched if no one can be trapped.
The activated tower launches a spectre protocol, which will summon a spectre of an explosion worker on the factory bridge that will place a detonator inside the factory.
This attack requires the detonator to be disarmed or a return to the past to be launched once the tower is deactivated.
The activated tower launches two spectre protocols, which will summon spectres of two men in black in the factory, with one attacking the supercomputer.
The damage dealt to the supercomputer will lead to several possible effects on Lyoko, and is essentially the hardest attack on MRCL:
This attack requires a return to the past to be launched once the tower is deactivated if the supercomputer has been damaged.
The activated tower launches a weather satellite protocol, which will deal damage due to pollen.
This attack can only be launched if the season in France is spring.
The activated tower launches a weather satellite protocol, which will deal damage due to a heatwave.
This attack can only be launched if the season in France is summer.
The activated tower launches a weather satellite protocol, which will deal damage due to thunder strikes attacking the player.
This attack can only be launched if the season in France is autumn.
The activated tower launches a weather satellite protocol, which will deal damage due to the freezing temperature.
This attack can only be launched if the season in France is winter.
Some modules actually had more attacks in total, but those have been removed as they were not interesting enough.
A tower was randomly activated, but it had no effect.
This attack was part of ProjectCarthage's Core module.
Multiple towers were randomly activated, but they had no effect.
This attack was part of ProjectCarthage's Core module.
The activated tower locked the boiler room at Kadic, forcing players to go through the park entrance.
This attack was part of the ProjectXANA module.
The ProjectXANA module also had another attack: BadWeather. However, it has been reworked in Phoenix and became the TerribleThunderstorm attack.