I personally cannot confirm your suggestion for the Troll is incorrect,but I think you are barking up the wrong tree.

Of course, Game of Thrones aficionados, may have made the same connection, but perhaps  ghosts only go boo.

I have white wolf, yet never killed a snowking, so that is not it.

I hit six level 6 ghost, 6 level 6 invaders and 6 Ubers and i got it

Interesting.

I have no reason to doubt what you say, and none to confirm your suggestion either.

However, this is at odds with what other players have claimed concerning this achievement, whereby low level palaces have White Wolf, and those that claim to have got it without doing as you suggested, but again I have no evidence either way on such claims.

Well all i can say thats what i did and i got it

This is the problem , players say they have white wolf and how they got it, but others try and fail, because its based on assumption and not fact.

Those that have them..... 

.....and know the real reason why.

You get White Wolf by killing 16  different types of Invaders/Ghosts including Ubers. Does not matter what level they are at least for the first 3 levels of achievement.

You get Tibboh for making Rings. Make Dragon Rings as they are cheap and fast to make. The number of rings per level is 5,10, 10, 10, 10, 10, 30, 70, 220, 650. You WILL need to buy extra inventory slots. Does NOT need to be Legendary, just make simple. Keep for 3 hours or until you get notification then dismantle. Start on next level.

Skald (rarest of Vikings) be blocked (blacklisted) by people. By level  10/20 for first level. Add 10 for each level after that. Can be the same person and done all at once per level. You both have to be online while doing this one.

Cannonball get booted from Valley of the Aesir (stronghold area) 5 times for level one. I don't know after that.

Thanks on behalf of everyone for your  information.

I am still sceptical about exactly what triggers White Wolf  as there are players still saying they got it without killing  any ubers.

I was interested in getting the achievement mainly to solve the apparent mystery surrounding it, but don't really have a current use for the bonuses so,having wasted a lot of things like energy and re-locations chasing dead ends, largely gave up when it was said you needed to kill ubers as well as the basic invaders.

I suppose it depends on individual players aspirations and game, but It makes it quite expensive to get the award for players who aren't very advanced or spending bags of money for energy.

Does anyone know how to get tibboh, cannonball baron or rarest of vikings achievments?

 Secret achievement Yes

Minimum level of the Palace

Reward (Gold)

Number of Warriors in Training

Troop Offense When Capturing Fortresses

How to get

Destroy (pieces, each type):

Invader: 16

Uber Invader: 4

Ghost: 9

  1 Lvl. 2 Lvl. 3 Lvl. 4 Lvl. 5 Lvl. 6 Lvl. 7 Lvl. 8 Lvl. 9 Lvl. 10 Lvl. Total

Minimum level of the Palace 1 1 1 1 1 1 1 1 1 1  

Reward (Gold) 100K 170K 235K 300K 370K 465K 725K 1.8M 5.95M 20M 30.12M

Number of Warriors in Training 2% 3% 4% 5% 6% 7% 8% 10% 13% 20% 20%

Troop Offense When Capturing Fortresses 1% 1.5% 2% 2.5% 3% 3.5% 4% 5% 6.5% 10% 10%

How to get  

Destroy (pieces, each type):

Invader: 16

Uber Invader: 4

Ghost: 9 1 1 

https://vikings.help/en/resources/achievements/2591/