Chrono Quest - Old Heaven Tear Realms
Chrono Key: The Chrono Adventure The Chrono quest line starts at level 70 with the quest "Heaven's Tear: Wraith's Ploy" which can be picked at General Summer (332 585) in south Archosaur.
After completing the quest line, players will obtain a Chrono Key. This key will allow players to get into Heaven's Tear of the past by way of speaking to the Messenger of Time (552 654) in the center of Archosaur, on the platform. A new key can be bought from the Messenger of Time if the old one is lost.
The Chrono Key can be put in the bank or the account stash. Though it can be placed in the account stash, other characters on your account cannot use it unless they have also completed the Wraith's Ploy quest line. A series of normal quests will be available in each map the player has unlocked.
Maps: Map I - Old Heaven's Tear Main article: Old Heaven's Tear This is first map that gets unlocked when the quest line has been completed. Players will need a flyer to navigate the map as Heaven's Tear is in the air. There is no interactive map to find one's way around in this area, only the mini-map is available.
Map II - Unicorn Forest Main article: Old Unicorn Forest After completing the Unicorn Forest's quest line, the second map will become available. Players can access the Unicorn Forest by talking to the Messenger of Time inside Old Heaven's Tear. The quest to enter the Unicorn Forest requires Heroe's Blood which is only available at certain times. There is no interactive map to find one's way around in this area, only the mini-map is available.
Map III - Valley of the Scarred Main article: Old Valley of the Scarred After completing the Valley of the Scarred's quest line, the third map will become available. Players can access the Valley of the Scarred by talking to the Messenger of Time inside Old Heaven's Tear. There is no interactive map to find one's way around in this area, only the mini-map is available.
Map IV - Moonshade Desert Main article: Old Moonshade Desert After completing the Moonshade Desert's quest line, the fourth map will become available. Players can access the Moonshade Desert by talking to the Messenger of Time inside Old Heaven's Tear and waiting for a short timer. There is no interactive map to find one's way around in this area, only the mini-map is available.
Dailies: Daily Quest Level 90: Monster of Xenoworld - Sage of Prophecy (368 520) When receiving this quest, you will be given one of the four options to complete to get the reward. Kill: 15 Soulthirst Houdrexes (84), 15 Claw Slashers( 87) 25 Skull Hunters (89) 25 Dream Inspectors( 88) 1 Blackhole Devourer (150) boss, can be tanked with a Hercules Reward: Coin 18000 EXP 30000 Spirit 6840 Item 4 Tears of Heaven
Other Quests Level 70: Polluted Lake - Apothecary Te (366 519) Kill: 8 Farland Clam(71) 7 Farland Kraufis(72) 6 Farland Mermaid(73) 5 Farland Tortoise(74) Reward: Coin 8892 EXP 14820 Spirit 3379
Level 75: Polluted Lake - Vendor Tang (369 517) Kill: Fierce Hyenclaw (75), item: 1 Stone of Vacuity Cerberuskin (76), item: 1 Golden Xenoscale Farland Slither (77), item: 1 Tentacle of Stream Farland Crustan (78), item: 1 Ironcrab Shell Reward: Coin 7560 EXP 12600 Spirit 2873 Item 4 Mirage Celestones
Level 90: Investigator - Guard Tienhsao (367 519) Kill: 2 Dream Inspector (88), 2 Skull Hunter (89) 2 Blasphemous Mage (92), 2 Ancient Ravenritter (93), 2 Ancient Evilwing (95) 2 Array Sentry, 2 Array Protector, 2 Array Guard Reward: Coin 18000 EXP 30000 Spirit 6840
Crafting: The addition of the past maps lets players craft gears. All the materials needed to craft the items are obtained from running Twilight Temple in Aria of Dawn mode, doing dailies in this map, world bosses, and summoning card bosses. In addition, one of the forges is where players manufacture the level 79 skill books.
Source: pwi.gamepedia.com