Master Mirror - Secrets and Easter Eggs

In the background of Tyrggvi Card for a moment we can see Harald the Cripple.

From the description:
It’s not betrayal if you side with the winner

We can conclude that he betrayed Clan Drummond for Clan An Craite.

Most likely, during the Clan An Craite war with Drummond, he was Tuirseach Jarl on An Skellig.

One of his voice quotes after playing is: Clan Tuirseach! An Craite clan! TOGETHER!

On the card we see Ildiko trying on a necklace, this is probably the same necklace she gave to King Bolehun - the same one who strangled him.

On a new board you can use Portal. At this moment there are 4 possible types of Portal.

Green ( Freixenet Card ):

Red and Blue:

Red ( Red Riders Card ):

In the background of last Auberon card, behind him we can see Eredin.
This is a curiosity and also a sign that in the future Auberon will be poisoned by Eredin.

In the background for a moment we can see a Geralt.

In the background we can see Master Mirror.

Master mirror is whispers to Usurper.
Its a reference to Makbet Book.

Naglfar - Wild Hunt Ship in the background.

In the background, on the right side we can see Master Mirror.

Master Mirror in the background

In the background, as a Captain we can see Master Mirror.

Master Mirror in the background

In the background, we see a part of Kerack Marine Card. which indicates that the Frigate is controlled by Master Mirror.

Kerack Frigate

Kerack Marine

Hundreds of An Craite Longships in the background

We can see Fergus Var Emreis image in the background ( Card )

We see Braathens transforming young Emhyr Var Emreis into a hedgehog.

The new Eredin skin is graphically improved. In addition, his voice lines has been changed.

Behind Bolehun you can see Ildiko, Virexas future wife.

Next to Skordal is Herkja Drummond (his daughter)

In the third Witcher, Geralt gets a contract for the apiarian phantom.

The Phantom is the Hound of the Wild Hunt, but several times larger.

The Footmen card is inspired by a scene from the movie Robin Hood (2010).

(from reddit)

The woman the Virexas dances with is Ildiko.

In the third version of Harald, he holds the head of Skordalia Drummond - his main rival in the An Craite - Drummond war

In the third form, Eithne holds her daughter's necklace, the same one we see in the second.

Behind the hedgehog we see Queen Calanthe, in the premium version of the card we hear theme of Master Mirror.

In the first version of Viraxas, we see Bolehun (His Father) watching him.

In Harald's Second Form, you can see a fragment of the Raider An Craite card on the ship

Harald

In Freixenet's card, we see Braenn - a brokilon dryad.
However, in the books and on her page, Braenn is not green, but white.



Freixenet

On the card we see Geralt, in the premium version we can conclude that he is on the ship during a storm, which means that the 'scene' is set right after Geralt signs the pact with Gaunter on the Ophirian ship