What is Celestial Island?
The Celestial Island is one of the main Idle Heroes which shouldn’t be ignored after level 30.
It is located at the top left of the main screen, right next to the Prophet Tree. All players have their own Celestial Islands.
On the Celestial Island, you can upgrade multiple buildings to get a lot of passive resources every day Magic Dust,
Gold,
Gems.
You can also attack the Monster Islands nearby for Stone of Voids,
Gold,
Monster Souls,
Gems and even
Universal Skin Shards If you are super lucky.
At the beginning, you start with the level 1 Watch Tower and 2 Empty Slots. Stone of Voids can be used to to upgrade buildings.
There are 2 kinds of Empty Slot:
- Pit: For building up Mines (resource buildings), which produce
over time.
- Holy Terrace: For building up Holy Relics, which provide some specific boosts for your Island.
The whole island is controlled by a headquarter which is called the Watch Tower. By upgrading the Watch Tower, you increase the number of buildings you could have and their maximum levels, as well as increase the number of Monster Islands and their rewards.
For every 2 hours, you will receive a Purple Daffodil, which can be spent for a battle attack.
Watch Tower
As mentioned above, the Watch Tower is the headquarter, the main building of the Celestial Island.
The level of the Watch Tower defines the size of the Island.
By upgrading the Watch Tower, you can increase the number of buildings you can build, their max level, get more nearby monster islands, better rewards and better capacity for the Purple Daffodil.
In general, the max level of your buildings = the level of the Watch Tower x 2.
Watch Tower Level | Pit | Holy Terrace | Celestial Island | Daffodils Limit Cap | ![]() | ![]() |
1 | 1 | 1 | 6 | 10 | 144K | 13 |
2 | 1 | 1 | 6 | 10 | 208K | 30 |
3 | 1 | 1 | 7 | 10 | 272K | 44 |
4 | 1 | 2 | 7 | 10 | 336K | 72 |
5 | 2 | 2 | 8 | 11 | 568K | 118 |
6 | 2 | 2 | 8 | 11 | 856K | 189 |
7 | 2 | 3 | 9 | 11 | 1144K | 268 |
8 | 2 | 3 | 9 | 11 | 1432K | 329 |
9 | 3 | 3 | 10 | 12 | 1720K | 429 |
10 | 3 | 4 | 10 | 12 | 2512K | 533 |
11 | 3 | 4 | 11 | 12 | 3472K | 620 |
12 | 4 | 4 | 11 | 13 | 4432K | 790 |
13 | 4 | 5 | 12 | 13 | 5392K | 884 |
14 | 4 | 5 | 12 | 13 | 6352K | 982 |
15 | 5 | 6 | 13 | 14 | 8752K | 1143 |
16 | 5 | 6 | 13 | 14 | 11M | 1317 |
17 | 5 | 7 | 14 | 14 | 14M | 1436 |
18 | 6 | 7 | 14 | 15 | 17M | 1561 |
19 | 6 | 8 | 15 | 15 | 20M | 1698 |
20 | 6 | 8 | 15 | 15 | – | – |
Because the level of the monsters on those adjacent islands is based on your Watch Tower level, below is a table showing when you will face the stronger enemies and the rewards you will get from them.
Please note that the “enemies” contain both small islands and the big island, the Nest of Void.
I strongly recommend:
- Checking the table below whenever you want to upgrade the Watch Tower to make sure your enemies will not get stronger.
- Saving enough
so that you can upgrade the Watch Tower and Holy Relics to the maximum of a level span.
For example, If your Tower level is 4, save enough Stone of Voids so that you can upgrade the Watch Tower to 7 and max out all of the damage boosting, HP boosting,… buildings. The enemy level will be still 120, the same as when the Watch Tower is at level 5.
Tower Level | Enemy Level | Boss Rewards | Island Rewards |
1-4 | 70 | 18x![]() ![]() ![]() | 4x![]() ![]() ![]() |
5-7 | 120 | 21x![]() ![]() ![]() | 5x![]() ![]() ![]() |
8-10 | 160 | 24x![]() ![]() ![]() | 6x![]() ![]() ![]() |
11-13 | 180 | 27x![]() ![]() ![]() | 7x![]() ![]() ![]() |
14-16 | 200 | 30x![]() ![]() ![]() | 8x![]() ![]() ![]() |
17-18 | 250 | 33x![]() ![]() ![]() | 9x![]() ![]() ![]() |
19-20 | 300 | 36x![]() ![]() ![]() | 10x![]() ![]() ![]() |
Expedition
The Expedition part is where you can find all of the monsters and bosses located on Celestial Island.
There is always only one Boss Island (Nest of Void) and lots of small islands nearby. They are similar to Guild Boss or Marauder, meaning you can attack it multiple times until it is destroyed.
You can attack them by using the Purple Daffodils. Each attack costs one.
Whether you have defeated them or not, It takes 8 hours for the Nest of Void Boss to respawn and 6 hours for the small islands to reset.
A Small Island only gives out the rewards after you completely defeat it. However, you can receive the rewards for every time you attack the Nest of Void.
If you are super lucky, you will receive Universal Skin Shards after defeating level 180+ enemies.
Tower Level | Enemy Level | Boss Rewards | Island Rewards |
1-4 | 70 | 18x![]() ![]() ![]() | 4x![]() ![]() ![]() |
5-7 | 120 | 21x![]() ![]() ![]() | 5x![]() ![]() ![]() |
8-10 | 160 | 24x![]() ![]() ![]() | 6x![]() ![]() ![]() |
11-13 | 180 | 27x![]() ![]() ![]() | 7x![]() ![]() ![]() |
14-16 | 200 | 30x![]() ![]() ![]() | 8x![]() ![]() ![]() |
17-18 | 250 | 33x![]() ![]() ![]() | 9x![]() ![]() ![]() |
19-20 | 300 | 36x![]() ![]() ![]() | 10x![]() ![]() ![]() |
Nest of Void (Boss)
Currently, there are 6 bosses in total which can be randomly called. They all have different abilities and stats.
Boss | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
Faction | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
Class | Mage | Mage | Assassin | Warrior | Mage | Priest |
Ability | Reduce attack | Burn | High damage | Stun | Skill Damage | Counterattack |
Mine Upgrade Priority
Gem Mine > Gold Mine > Magic Dust Mine
Resource Buildings (Mines)
There are three kinds of resource buildings and they all can be only built in the Pit.
The higher level your mine is, the more resources it can produce over time.
It always costs 12K and 50
to build a resource building at the first time.
Gem Mine
The Gem Mine produces Gold over time.
You can build no more than 2 Gem Mines.
Gold Mine
The Gold Mine produces Gold over time. You can build no more than 2 Gold Mines.
Magic Dust Mine
The Magic Dust Mine produces Magic Dust over time. You can build no more than 2 Magic Dust Mines.
Holy Relic Upgrade Priority
Vitality > Harvest > Tyrant > Red Moon > Swiftness
Holy Relics
There are 5 kinds of Holy Relics, which can only be built on the Holy Terraces.
Each kind grants a different boost for your Island.
The higher level they are, the more value they can boost.
It always costs 7000 and 30
to build a level 1 Holy Relic.
Holy Relic of Vitality
The Holy Relic of Vitality generates Purple Daffodil overtime, giving you more turns to raid the nearby monster islands.
You can only build one Holy Relic of Vitality.
Take a look at the table below to see the required time to generate speeds, capacities and upgrade costs!
Holy Relic of Harvest
The Holy Relic of Harvest increases the generate speed of all resources buildings (by a certain %) on the Celestial Island. Each level increases the generate speed by 1%.
You can build only one Holy Relic of Harvest.
Holy Relic of Tyrant
The Holy Relic of Tyrant boost the attack of your whole team when fighting on the Celestial Island only. Each level increases the attack power by 1%.
You can build up to 2 Holy Relic of Tyrants.
Holy Relic of Swiftness
The Holy Relic of Swiftness boost the speed of your whole team when fighting on the Celestial Island only. Each level increases Speed by 1 point.
You can build up to 2 Holy Relic of Swiftness.
Holy Relic of Red Moon
Holy Relic of Red Moon boost the Health of your whole team when fighting on the Celestial Island only. Each level increases Health by 1%.
You can build up to 2 Holy Relic of Red Moon.
Infographic
Click on the image to get the bigger version
6 Comments
Just because I did the math I thought I’d share, going from a maxed out lvl 10 tower to a maxed out lvl 13 tower is 7875 Stones of Void. Including the 3 tower levels, 6 levels to each building on terrace and pit, as well as 26 levels on two new buildings you can now build.
Thank you so much! I was browsing this website trying to find exactly what you posted. Looks like I’m gonna save up 7875 stones before I lvl up my tower.
nice!
And taking the tower from 13 to 16 means 14650 more stones 🙂
true
Nice share. Thank you a lot buddy!