Asura Palace Quest/Spoiler

==Method==
Note: It's recommended to start The Lost Brother Quest by accepting the mission from its NPC before doing the Asura Palace Quest, to save time. This way you can complete both quests at the same time.
Go to the Asura Palace in Tiquanda, . Here you will encounter many Dawnfire Asuri, Midnight Asuri, Frost Flower Asuri and Hellspawns, so be careful.
On the very top floor there is a Sealed Door leading to the room of The Flaming Orchid. When trying to open it, you will see the following message: You see the images of liches, fire and energy elementals, hydras and destroyers over the doorframe. They're dark and faint. In order to be able to access this room, you will first have to kill these five sets of creatures that can only be reached through entrances hidden throughout the tower. This has to be done individually, so keep this in mind if you plan on going with a team. However (and similar to how the Nightmare Teddy Quest works), others are allowed to block for you or heal you as long as they do not attack the creatures.
To reach the three Hydras, go to the little patch of green on the ground floor and fall into the Pitfall . Kill them and go up again.
To reach the two Liches, go to the westernmost part of the ground floor and step on Some Cracks (Hole) . Kill them and go up again.
To reach the two Destroyers, fall through some cracks to the southwest of the green patch on the third floor, . Kill them and go up again.
To reach the two Greater Fire Elementals, fall through some cracks in the northeasternmost part of the fourth floor, . Kill them and go up again.
To reach the two Greater Energy Elementals, go to the northeasternmost part of the first floor and then fall through some cracks, . Kill them and go up again.
You should now be able to enter the Sealed Door and kill The Flaming Orchid. If you have previously completed The Lost Brother Quest you will receive the achievement Lost Palace Raider after killing her.
In addition, you can find a chest containing three Small Sapphires on the highest floor of the western part of the tower, and a Sarcophagus (Quest) containing three Small Rubies on the highest floor of the eastern part of the tower.
Actually the bosses are three: The Moonlight Aster, The Flaming Orchid and The Winter Bloom. In order to reach every one of them you have to kill specific monsters hiding all over the palace.
The Moonlight Aster (level +5): kill 2 Vicious Liches and 2 Vile Destroyers
The Flaming Orchid (level +5): kill 3 Cave Hydras and 2 Greater Fire Elementals
The Winter Bloom (level -1): kill 1 Solitary Frost Dragon and 2 Greater Energy Elementals
The easiest and fastest way to kill all the monsters and bosses is to start at the level -1. We kill 2 liches and 1 frost dragon, then we go up and go down a hole to kill 3 hydras. Go back and go up (+1) and to the right, down the hole to kill 2 energy elementals. Go back and go up twice (+3) and to the left down the hole to kill 2 destroyers. Go back and go up (+4) and to the right down the hole to kill 2 fire elementals. Go back and go up (+5) where you have 2 boss rooms of The Moonlight Aster (left one) and The Flaming Orchid (right one). Now go all the way down to the beginning (hole with liches and frost dragon) to reach boss room of The Winter Bloom.