First the most asked question will be.

I got a bone but it is not showing up on the skeleton.

You must get each bone on the skeleton 3 times. The skeleton bone becomes brighter from the first bone in any specific location to the third in that same location.

There are 162 bones that need to be collected even though there are oinly 54 showing up on the skeleton. So while you may not see the bone collected very well the meter will count up from 1 to 162.

Now this part is important.

>>>You may find obstacles along the way. When this happens, you can complete an objective to remove the obstacle, or use one of the other options available:

First 14 objectives: Pay 10,000 Equus
After 14 objectives: Pay 1 Pass<<<

We asked about this and here is MeOw's answer

>>>
The Equus option is based on the number associated with the objective. Since they are sequential, you will receive Objectives #1 - #14 in order, same for all players. Beginning with Objective #15 and onward, the Pass option replaces the Equus option.

Cheers,
MeOw<<<


Next the progression from tool to tool.

2 days *for Tank*
3 days *for Helmet*
4 days *for whatever that Yellow tool is*
4 days *for the submarine?

This is going to be very very very slow.

Key note on the barter.

Make sure you have done any digging on the tool you have BEFORE bartering up. You will lose digs if you don't. Any unused digs go against the new tool and you lose the digs you would have gotten from the old tool.

In other words if you had 5 digs left and the next tool is 20 digs you only get 15 digs. If you use all the digs on the old tool first then the new tool resets at 20 and you would have had used the 5 from the old tool.

If you wait for the help and don't buy the mines right away they come up about 7 days into the promo at 6 mines per pass instead of only 3 mines per pass.

All digs are heavily weighed on the relic side with at least 80% of your dig producing relics over BM items, bones or traps.

However all leftover relics once you have gone up in tools can be bartered for mines.

So 12 relics will get you 1 mine.

And Mines do not have traps attached to them but do have fewer BM items or bones so beware.

Based on what I have done this will require between 20-30 passes to complete ( assuming you take advantage of the doubling bonus part way in)

The final number of passes being based on

How many bones you are finding vs. Relics and other items
How often you can dig (the more relics you find, the better tools you can barter for)

For example - on Preprod, even after using the equivalent of 40 passes, and only missed 10 digs due to a screw-up on my part (I had enough Relics to trade for the next tool as soon as able) - I was STILL short 30 - 40 something bones of the required 162 to get Devoted Indigo.

Here's another rough example of differing amounts of Passes based on 1-day sample results with each tool based on MY experience *you may find more or less bones, relics, traps, prizes, etc*

Snorkel and Mask (10 digs)

8 Relics
2 Bones
0 Prizes
0 Traps

Oxygen Tank (15 digs)

10 Relics
4 Bones
0 Prizes
1 Trap

Diving Suit (20 digs)

10 Relics
6 Bones
2 Prizes
2 Traps

Propeller (25 digs)

13 Relics
8 Bones
2 Prizes
2 Traps

Robot (30 digs)

19 Relics
10 Bones
1 Prizes
0 Traps

Now, let's focus on the Bones gotten. We'll assume with our other digs, we got enough Relics to barter for the better tools for the various amounts of digs per day for these dates *dates are preprod dates NOT live dates*:

Days 1 and 2 (13th and 14th): 10 digs per day
Days 3, 4, and 5 (15th, 16th and 17th): 15 digs per day
Days 6, 7, 8, and 9 (18th, 19th, 20th, and 21st): 20 digs per day
Days 10, 11, 12, and 13 (22nd, 23rd, 24th, and 25th): 25 digs
Days 14, 15, and 16 (26th, 27th, and 28th): 30 digs

So:
Day 1 - 2: 4 Bones
Days 3 - 5: 12 Bones
Days 6 - 9: 24 Bones
Days 10 - 13: 32 Bones
Days 14 - 16: 30 Bones
Final total: 102 Bones
Total needed for Indigo: 162 Bones

*Remember that Mines would need to be used before the promotion ends, so the day 14 - 16 count is not 100% accurate as the 16th is not a full day and you would have to log in before the promotion ends to get your digs in*

Still 60 Bones short of Devoted Indigo - time for Mine usage to make up

Looking at my history with Mine usage in a single day (3 mines for 1 pass):

2 Bones
1 Prize
0 Relics
0 Traps

If I continued to have this luck with single mines...I'm looking at 30 passes to make up my missing 60 Bones (2 bones each time ; 2 x 30 = 60).

If we calculate this with my results based off a run with Double Mines (6 mines for 1 pass):

3 Bones
2 Prizes
1 Relic
0 Traps

This comes out to only needing 20 passes (3 bones each time ; 3 x 20 = 60)

Final potential pass cost based on these numbers: 20 to 30 passes

Again though, this is just based off a very small sample of numbers and the assumption that one will get these amounts every dig.

In short - for the Underwater Excavations - expect it to require anywhere between 10 to 50+ passes.