You can only undertake 2 bounties per day. You may accumulate a maximum of 3 days of bounties (6 bounties total)
Unstable hunts will have a red image over your monster and a timer.
There will be a secondary objective when you start that is optional. If you want to get credit for the optional part you need to do that first since the quest will finish when you kill the main monster.
You can only get secondary objective bonuses from unstable hunts 3 times per day.
This bonus will not be boosted by the use of loot tickets
Elite lvl90+ and Elite lvl40 five stars unstable hunts secondary objectives reward gold points for the weapon stone (only way to farm them in-game).
This guide is courtesy of @Gomico, one of our Chinese players. All credit goes to him and the original document can be found here.
The arena system unlocks at level 25 and is called "Thousand Hunting Trial(千狩试炼)."
The arena will give you materials for upgrading Necklaces and Meow Meow Coins. You can use the Meow Meow Coins to eget materials from the ShiroNeko Shrine girl. Necklaces can be purchased from the arena npc.
There are 7 arenas total with multiple rounds. These rounds have more than just killing monsters, there are different requirements on the side of the screen for each round. After each round you need to choose one of the supplies. The faster you finish the round the more choices you will have.
After you complete all of the Story Quests your task is to complete HR hunts! This is a new tab of the Gate 2 hunting screen on the top right. These HR hunts will give you HR materials from the large monsters you kill for crafting Lvl 40+ Weapons and Armor. In addition to HR materials, you will be given White HR Certificates. When you collect enough of these (5) you can exchange them to unlock an Elite (1 and 2 Star) monster! After you kill 3 of these Elite monsters you can go to Gate 3 and do the 3 and 4 Star HR hunts. These will give you Rank 2 HR Certificates to unlock 3 and 4 Star Elites. The raid tower also has elites to unlock. These 5 star Elites can be unlocked by completeing the 5 star HR hunts in the tower. The first two Elites here can be unlocked with 5 tickets, while the third and forth require 5 tickets in addition to defeating the other 5 star Elites at least once.
Each unlock costs 5 rank one documents
Each unlock costs 5 rank two documents
Each unlock costs 30 rank three documents
After unlocking any three 1 or 2 Star Elites and beating them you can now start the quest to unlock Raids. There should be a green "!" in the second city. The quest will lead you to the tower to talk to the NPC there. Talk to him and go to the quest hub in the tower. On the second tab there are two quests, do both of them and then you are ready to do weekly raids!