Create a rule called Influence:

Each Baron has a publicly tracked numerical Influence Score which defaults to 0. For each Human Crown in a Baron’s Keep or their Stockpile, they have 1 greater Influence. For each Human Alliance a Baron has, they have 1 greater Influence. If a Baron has 4 or more Influence, and no other Baron has greater or equal Influence to them, then that Baron has achieved victory. Alternatively, if no Human Kings have Human Crowns in their keeps then the Baron who has the highest influence (and who has held that influence value for the longest in the case of a tie) achieves victory.

Add a Subrule to Influence called Human Kings:

There are 7 Human Kings; The King of the Plains, The King of the Valley, The King of the Forest, The King of the Mountain, The King of the Sea, The King of the Desert, The King of the Tundra. For as long as a King has a keep, where that keep has at least one Human Crown in it, that King can have an Alliance with any number of Barons (denoted as a Human Alliance with that King for that Baron). Otherwise, they can have 0 Alliances.

Add a subrule to Resources called Unique:

Some resources are denoted as unique. A Royal Gift cannot be transformed into a unique resource, and it is illegal for more than one of a given unique resource to exist at any one time.

Add a subrule to Resources called Crowns:

There are seven Human Crowns, each of which are unique resources. They are: Plains Crown, Valley Crown, Forest Crown, Mountain Crown, Sea Crown, Desert Crown, Tundra Crown.