World Boss and Guild Raid

World Boss and Guild Raid events occurs once each 4 days and have 24 hours of duration. They are switched each 4 days starting with fire boss, then ice, then earth, so on.

On Boss's attack description we use the following notation for the tiles in combat formation for player's team: The reason for this notation is that tile number 1 is frontmost, number 2 is 2nd frontmost and so on.

World Boss
When facing the World Boss, the player can choice both friend's shared servant or shared servants of other guild members to support his/her team. Each player have 5 tries. There are 5 world bosses, they are switched each 4 days in following order:
 * 1) Fire Dragon (Cadmus) - 3x3 tiles, breath atk (hits 2,4,5,6,7,8,9).
 * 2) Ice Dragon (Ladon) - 3x3 tiles, breath atk (hits 2,4,5,6,7,8,9).
 * 3) Earth Dragon (Hog) - 3x3 tiles, tail atk (stun 9 sec, hits 1 row).
 * 4) Azlime of Light - 1x1 tile, special atk hits 1 column.
 * 5) Azlime of Darkness - 1x1 tile, special atk hits all tiles.

Guild Bosses
The player can only choice shared servants of other guild members to support his/her team. Each player have 3 tries. There are 10 guild bosses, they are switched each 4 days in following order:
 * 1) Nehreja (Nerja) - 1 tile, special atk hits frontmost.
 * 2) Tiamat (Tiamet) - 2x3 tiles, same atks as in album.
 * 3) Aaron - 2x2 tiles, same atks as in album.
 * 4) Seraph - 2x2 tiles, same atks as in album.
 * 5) Leto - 2x2 tiles, same atks as in album.
 * 6) Mei - 1x1, special atk hits all tiles.
 * 7) Kiros - 2x1, have 3 atks (1 hidden attack): 1st atk hits 7,8,9. 2nd is regular attack that hits 3x2 area centered at main target. And last hidden atk hits all tiles.
 * 8) Distroian - 1x1, special atk hits 1,3,4,6,7,8,9.
 * 9) Kushyal - 1x1, special atk hits all tiles.
 * 10) Acheron - 1x1, special atk hits all tiles.

Boss Attack Table
World and Guild Raid Bosses starts with a random base attack of 25-40. During each battle their attack increases 50 each 2 seconds for first 5 minutes, then increases 100 each 2 seconds after 5 minutes mark. The following table is boss attack value as function of time (since the difference is insignificant, we consider the both equals to 30 to make the numbers below simpler):

* The in game description "boss atk increase x2 every 5 minutes" is wrong, the multiplier stops at x2, it do not go over to x3, x4 etc. So the increment is linear.