"for a quick calculation of how much this would cost.

Say you get 3 vintage apples for 3 packs/passes each which will get you to 108 skill
then 1 pass will get you to 120 by getting 5 aging points.
1 Stroke and 1 Tear will get you to 210 skill and cost 3 more packs/passes.
Then 1 divine ornament will cost 3 more packs/passes and will get your Blitzen high enough in skills to get any tree.

That is 10 passes so far. you will already have one divine ornament and each additional one will cost you 3 passes.

I Love You Divine is 6 divine ornaments. = 10 + 5*3 = 25 passes
Sequoia or Tangaroa needs 7 divine ornys = 10 +6*3 = 28 passes
Tanaris needs 9 divine ornys = 10+ 8*3 = 34 passes
Thor needs 11 divine ornys + 1 more packs worth of ornaments = 10 + 10*3 + 1 = 41

These should be max numbers and should go down based on what ornaments we get for free daily."

However, they realized you need to factor in needing to decorate the previous levels of the tree as well (i.e you have to decorate the Piece of Cloud, Harmony Pack and Horse statue levels of Thor's tree first, before actually decorating Thor's level), which increases each divine estimate by 3 passes as you can complete each level of those trees with one decoration pack purchase. Also, the estimate might go back down a bit depending on how many free divine ornaments we win, and I did get one in the Advent Calendar so far.

If someone wants to double check, or do their own calculation they should be able to based off of the spreadsheet and other information provided.

This is assuming you go for Thor, decorate the suggested trees I highlighted, and *not* taking into account the freebies, which should lower it by several passes at least, I hope.

1st goal=reach 90 skills for Bristlecone tree>>>Decorate Oriental tree 8 times. I say 8, because even though you can reach 90 by decorating the Vintage Apple twice and the bonnet once to get 96, you're having to progress through each prior level which is about 8 steps. Or you could just do the first level 8 times to pay an easy 1 pass for auto decorate. However, this estimate could decrease by a pass or two as I can't remember if Blitzen gets skills from doing the tutorial, but I'm estimating the higher amount to be on the safe side.
Cost=8 passes
Blitzen's new skills=96

2nd goal=reach 120 skills for Love Tree (we need 24 more skills)>>>Decorate first level of Bristlecone Tree 2 times.
Cost=2 passes
Blitzen's new skills=120

3rd goal=reach 200 skills for Plant Tree (need 80 more skills)>>>Decorate Love Tree 5 times
Cost=5 passes
Blitzen's new skills=210

4th goal=get 11 divine ornaments (possibly less depending on freebies.I have gotten 1 from Advent Calendar) from Plant Tree's 3rd level.
Cost=33 passes because you're decorating 3 levels 11 times.
Blitzen's skills don't really matter now, because you'll easily get the skills needed for the Thor's Nordic Tree by getting your divine ornaments

5th goal=decorate the 4 levels of Thor's tree
Cost=4 passes

This brings my total (not counting freebies) to 52 passes for Thor.
Taking Blitzen's freebies into account it looks like we get 2 baubles, 1 tinsel and 1 ornament a day. If it's a 19 day event or so that's 38 baubles, 19 tinsel and 19 ornaments, which is at least the equivalent of about 6 trees you can fully decorate, yeah?(meaning any tree that requires no more than 3 decorations each on a single level). I've only gotten 6 baubles and a divine ornament from the Calendar so far, so I can't make any good guesses based on that, but with freebies that brings us down to maybe 46 passes.

This is based on the images shown and last years costs. I picked this information from another site and think they are pretty close.

Rikiki Pack - 30Euro
20 passes
The Falabella unicorn Chiquitin
500,000 Equus
100 x Ageing point

LUCKY DAY PACK - 50 Euro
10 passes
A Divine Loki
2 months VIP account
4 x Titan's Challenge
4 x Golden Fleece
4 x Horn of Plenties

OLYMPUS PACK - 85Euro
80 passes
A divine mythological horse of your choice.
A divine Greyfell
A Hippogriff companion
1,000,000 Equus
200 x Ageing point

ULTIMATE PACK - 150Euro
110 passes
A divine mythological horse of your choice.
A divine Greyfell
The Falabella Unicorn Chiquitin
A divine Loki
A Hippogriff companion
2 months VIP account
4 x Titan's Challenge
4 x Golden Fleece
4 x Horn of Plenties
1,500,000 Equus
300 x Ageing point

So they cost real money.

Will we need passes to get the divines for the Christmas promo? Would love Taranis and Sequoia!

Legacy Ann reposted the estimate for all the dvines at the top of this page, unfortunately for Sequoia and Taranis you're looking at spending around 62 passes :/ the freebies weren't calculated in, but you'll definitely need passes

First and foremost: which one is the divine ornament? I saw everybody suggests the Plan tree's lvl 3, for the divine ornaments, but only the small, yellow pine ornament is the divine ornament or the other horse ornament too (given by the maori tree at lvl 3)? Or that one is just a simple ornament? Thanks a lot :3

I've personally been advising the Plant tree because you get to it quicker than you will the Maori tree. Plant tree only requires 200 skills to unlock, while the Maori tree 240. I've successfully put both ornaments on a divine tree, so it doesn't matter which you use

I don't mind the cards but i find myself eager to find out what the next promo will be. I don't know what it is about the cards maybe it's because all i got today were 5 copies of what I already had.

Yikes, I thought based on the given estimate that you could get ALL the divines for around 40-50 passes, and that those weren't individual estimates. I misunderstood, no wonder why they seemed so cheap!

I don't think this will be a companion, assuming from this picture, as it's URL adress says "/chevaux/special/",,
If it would be companion, it'd have "/compagnons/" in it?