Endgame

Unleashing
Each area except towns contains a summoning pillar that the hostiles use to send monsters into the world. By using a summoning orb, you can trigger the pillar, summoning a unique raid boss. When you kill a raid boss in an area, that area permanently becomes Unleashed. It appears as red on your world map. Unleashing areas cause the hostiles to take notice of you. If you are strong enough, they will send stronger troops to that area. If you are level 100 and enter an unleashed area, all monsters will spawn as level 100 monsters, regardless of that area's normal level. Raid bosses also spawn as level 100.

Summoning orbs are often brought into this world by strong hostiles. Any level 100 monster can drop one.

Unleashed areas have longer respawn times for monsters. You can unleash many adjacent areas to be able to farm constantly.

Unleash guide: Video.

End game
In the early game, you kill monsters and low-level bosses and level up to 100. Then you can start unleashing areas. Once you have killed ten unleashed bosses, you can summon the end boss, Drex, from a regular summoning pillar. Drex will spawn alongside the area's normal boss. Each character can kill Drex only once and will get additional rewards.

Once you unleashed all areas (including The Nexus and Varkarion Plane) and killed Drex, you can summon Sylfir, the uber end boss, from any summoning pillar. Sylfir will spawn alongside the area's normal boss. Each character can kill Sylfir only once and will get additional rewards. Once Sylfir is killed, all bosses in the game become harder and give more rewards. Killing Sylfir also gives you another respec from Mr Martino.

Assault
Once you killed Sylfir, you can enter one of the invading planes and take the fight to them. Everyone must enter the area within 10 seconds of each other. Once the assault begins, monsters will spawn endlessly until everyone is dead. You can try to break the record time. Monster in the assault give low rewards because they are not equipped for attack. Assault is not meant for farming. The monsters are however stronger because they have not planeshifted recently. Avengers cannot spawn during assault because you are already in their plane.