Very Hard: (level 80-100)

Ancient Devil

There are many ancient and dangerous devils in Bird Island. Many years ago they were evil bird men, but over centuries, they committed evil rituals and turned themselves into horrid devils.

Ancient Devil
Prerequisites: Level 80 and above
NPCs: Exorcist (Bird Island 715,584), Warrior Guard (Ancient Island 229,233), Trojan Guard (Ancient Island 191,201), Fire Guard (Ancient Island 181,176), Water Guard (Ancient Island 206,179), Archer Guard (Ancient Island 243,219)
Rewards: 5x meteors or a dragon ball.
Special: The rewards are good, but you'll have to be patient and careful -it might be better to wait until you're level 95 or higher, especially if you're a warrior or trojan.

i. Speak to Exorcist and enter the Ancient Island.
ii. Speak to the guard that holds the same profession as you to enter another map. In that new map, you have to kill some monsters. When the monsters die, they quickly scribe a certificate for you with their last dying breath (certifying that they were indeed defeated by you.) Exchange the certificate for an Amulet.
iii. Collect the five Amulets (Water Amulet, Fire Amulet, Trojan Amulet, Warrior Amulet, Archer Amulet) and then enable the shining yellow switch (218,208) to bring the Ancient Devil out, who is protected by several tough guards.
iv. Kill the Ancient Devil to get a Dragon Ball or 5 Meteors.