These are the toughest monsters in the world, from community bosses that anyone can help with to monsters for very experienced adventurers.
Community and event bosses
- Hula Guardian — appears at the Aeven Fishing Docks; everyone who helps is rewarded. Safe for beginners.
- Hollowmaw — Halloween only, in the Hollow Graveyard.
The strongest monsters
 Octopus Boss Aggressive | 4 | 1,300 | 330 | 7 | Octos Lair |
 Anundo Leader Boss | 3 | 1,170 | 270 | 3 | Building near Death Cave |
 King | 42 | 13,000 | 150 | 1 | Imperial castle |
 King | 42 | 13,000 | 150 | 1 | Imperial castle |
 Hell Guardian Aggressive | 154 | 39,000 | 1,500 | 0 | Area near Aeven (3), Hall of Pain +1 |
 Bogo Man | 4 | 1,000 | 90 | 2 | Area near Aeven (6) |
 Angry Vine Aggressive | 4 | 1,300 | 168 | 1 | Area near Aeven Port (5) |
 Swamp Monster | 3 | 1,040 | 170 | 3 | Area near Aeven Port (2) |
 Apozen Aggressive | 43 | 10,400 | 750 | 5 | Area near Aeven (3) |
 Crane Aggressive | 3 | 1,066 | 138 | 1 | Crazy Factory |
 Proto Aggressive | 11 | 2,600 | 432 | 4 | Crazy Factory |
 Princess | 42 | 13,000 | 150 | 0 | Imperial castle |
 King Wurm Aggressive | 26 | 7,020 | 210 | 0 | Area near Aeven Port (4) |
 Gnoll | 5 | 1,300 | 216 | 5 | Death Cave #3, Underground Fort |
 Phoenix Aggressive | 6 | 1,256 | 91 | 3 | Area near Sky Wonder |
 Dragon Aggressive | 56 | 11,000 | 1,251 | 7 | Atlantis Pathway |
 Artist | 46 | 10,000 | 1,216 | 1 | Hall of Pain, Unnamed area 264 |
 Ancient Wraith Aggressive | 25 | 4,000 | 369 | 2 | Ghost Mansion #4 |
| Apozen Overlord Boss | 161 | 34,000 | 6,666 | 3 | Hall of Pain |
 Hula Guardian Aggressive | 5 | 400 | 0 | 0 | Aeven Fishing Docks |
Before you go
Many of these are aggressive and live behind level-locked passages. Check their HP and damage on their page, bring potions and friends, and remember that defeat costs you nothing but the walk back.