From now on, you will gain "monster point" for each kill of some monsters. After gaining enough of monster points, you will be able to spawn for you and your team unique Boss. After you collect enough of points are ready - visit NPC Monster Master located at center of Heavenia. Talk with him about "Challenge"
Monster image
Spawning monster:
Monsters to kill
Monster points required
Orshabaal
Demons
1500
Asakku
Demon Fathers
1500
Abraxas
Skull Demons
2000
Cursed Knight
Blue Knights
1000
Cursed Hero
Hero Highguard
1000
Cursed Templar
Black Templar
2000
Demodras
Dragon Lords Solar Dragons White Dragons Demonic Dragons Toxic Dragons