How To Play Royal Galea

About Galea, from BoardGameGeek:

This wonderful deck of cards allows you to play 3 different head to head games, and even includes many variants for both Common and Noble Galea! The goal of Galea was to make a deck of cards and a group of games that felt as if they could be ancient. Rules seemingly unknowable until known, a feel of ancient tradition and play, ideally to the levels of chess or poker. Each game of Galea has variants to help with this feeling of it being evolved and changed as it moved place to place, continent to continent, and hopefully it succeeded. -description from the designer