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Deep Sea ExpeditionDeep Sea Expedition

A seabed dig: a pickaxe opens one cell of a 6×5 board, and one of them hides the stairs down. The deeper the floor, the bigger the depth reward, while the cells along the way pay crystals for the shop. Five special floors hand out other systems' tickets, from gene awakening cards to season chests. The shop's top slots are unlocked by DEPTH reached, not by currency.

Duration: 10 days
ExcavationExchangeBattle passLeaderboardQuests

How the board works

A pickaxe opens one cell of a 6×5 board — 30 cells in all. You may only dig next to a cell already opened, and obstacles do not conduct. One of the cells hides the stairs: find them and you drop a floor.

The bomb is luck, not a loss: it blows the whole board open, you take the rewards from every cell of the floor and the stairs are right there.

Treasure Hunt Carbon Pickaxe — one of these per digEarth Vein Crystal — the shop currency

Auto-dig unlocks after 10 digs. The floor cycle is 300 long, after which the layouts repeat. One event cycle runs 10 days.

The event advertises:

How many digs come for free —Treasure Hunt Carbon PickaxeTreasure Hunt Carbon Pickaxe

Everything one event cycle (10 days) hands over without paying.

Free pack, once a day×20
Daily pack bought with diamonds (6,880 diamonds over the run)×100
Event quests: log-in, runs, kills, ads, bosses, arena×250
Event quests that ask you to spend diamonds×50
Free branch of the battle pass×30
Paid back while digging: daily quests, daily chests, depth rewards×120
Digs in total570

570 digs at roughly 9.8 per floor reach floor 59, which collects 3 of the 20 depth rewards.The first one missed sits on floor 60.

The same run banks about 15,582 crystals (Earth Vein Crystal) — against a top shop slot priced at 12,000.Currency is not what stops you, though: the shallowest locked slot asks for floor 60.

Depth calculator

Build a wish list — we work out how many digs it takes over 10 days and what topping up on Treasure Hunt Carbon Pickaxe costs.

The list is empty — pick a prize and press Add.

Expectation math: a floor costs the average number of digs needed to turn up the stairs, and a cell pays the average of its pool. A real run lands either side of that. Crystals are counted as spent on the selected prize only.

What the cells hold

A floor's layout comes from its archetype, and the 300-floor cycle deals them in a fixed order. Shares are per dig; tap a row to open the reward pool.

Every 5th floor is a prize floor: it hides a guaranteed grand prize, but the stairs turn up three times more rarely, so it costs ~13.5 digs against ~9.04 on an ordinary one. If you do not want the prize, take the stairs the moment you find them.

FloorsCells and their sharesDigs

Prize-floor rewards

Every 5th floor of the 300-floor cycle hides a special cell with a big prize. There are 2 kinds of it, and which one you get follows the floor number.

Depth rewards

One-off rewards for reaching a floor. The ladder runs to floor 1000, even though the layouts themselves repeat every 300 floors.

Floor 10
Floor 20
Floor 40
Floor 60
Floor 100
Floor 120
Floor 140
Floor 170
Floor 200
Floor 230
Floor 260
Floor 300
Floor 350
Floor 400
Floor 450
Floor 500
Floor 600
Floor 700
Floor 800
Floor 1,000

Daily chests

Opened by the number of digs made that day, and reset with the day.

20 digs in a day
60 digs in a day
150 digs in a day

Exchange shop

The currency is Earth Vein Crystal. Some slots are locked by depth reached rather than by price.

PriceGateGoodsLimit
12,000Floor 250×1
12,000Floor 200×2
12,000Floor 200×1
6,000Floor 160×2
10,800Floor 140×10
12,000Floor 120×1
10,800Floor 120×10
10,800Floor 100×10
10,800Floor 80×10
9,600Floor 80×2
9,600Floor 60×2
8,000Floor 40×3
8,000—×1
6,000—×2
6,000—×5
6,000—×5
2,000—×3
2,000—×3
2,000—×5
2,000—×5
300—×100
200—×100
100—×200
100—×200
30—∞
20—∞
20—∞
5—∞

Expedition Battle Pass

The pass does not level on digs:«Spend stamina to upgrade your Battle Pass»The paid branch is $19.99.

ThresholdFreePaid
0
30
60
100
150
200
250
300
350
400
450
500
600
700
800
900

Leaderboard, top 100

1. Rankings are based on the number of treasure hunts within the event. 2. Leaderboards are settled daily, and rewards are distributed via mail.

Prizes on show:

#1
#2
#3
#4–5
#6–10
#11–30
#31–50

Quests

Daily quests reset every day and count only what was done that day.

Excavate a total of 2 level(s)
Excavate a total of 5 level(s)
Excavate a total of 10 level(s)
Excavate a total of 20 level(s)
Excavation yields 50 Earth Vein Crystal(s)
Excavation yields 100 Earth Vein Crystal(s)
Excavation yields 200 Earth Vein Crystal(s)
Excavation yields 500 Earth Vein Crystal(s)
Own any Monthly Pass

One-off event quests, 40 of them — they pay in pickaxes.

Log in: 1 day(s)
Log in: 2 day(s)
Log in: 3 day(s)
Log in: 4 day(s)
Log in: 5 day(s)
Log in: 6 day(s)
Log in: 7 day(s)
Log in: 8 day(s)
Log in: 9 day(s)
Log in: 10 day(s)

Limited-time offers: where they drop

The pop-up bundles are not random: each sits in a gift cell on its own floor. A 300-floor cycle holds 13 of them, then the floors repeat. A window lasts 120 min and sells once — buy it and it is gone.

PriceFloorsPickaxesLimit
$0.996, 114, 154, 214, 234, 254Basic Expedition Pack · 15X Value24×100
$4.9954, 134, 194Advanced Expedition Pack · 10X Value72×30
$19.9944, 174Legendary Expedition Pack · 8X Value192×30
$49.9984, 274Mythic Expedition Pack · 7X Value352×30

The cell is one of thirty on its floor, so the ladder can end the floor before you dig it out. A free run usually stops around floor 59. The limit is the ceiling on purchases over a run, but what usually binds is the number of windows you meet: one window, one purchase.

Packs

Best rate: $0.99 → 20 pickaxes, or $0.05 each.Worst is $99.99 → 400 pickaxes at $0.25 each — the bigger the purchase, the worse the rate.

free×1 a day
Diamonds688×1 a day
$0.99×1 a day
$2.99×1 a day
$4.99×2 a day
$9.99×5
$19.99×5
$49.99×10
$99.99no limit

Game rules

  • 1. Use Treasure Hunt Carbon Pickaxes to dig blocks, find the next level's entrance, and explore more events.
  • 2. The Treasure Hunt Carbon Pickaxes and Geostones will be converted to a small number of Coins after the event is over, so make sure to use them before that.
  • 3. You must meet certain conditions before you can manually claim floor rewards. Unclaimed rewards will be sent via mail after the event is over.
  • 4. The ranking list is based on the number of treasure hunts, the list is settled daily, and the rewards are distributed by email