Giant Kings adds the ability to create factions led by a giant, however, it also expands the world in which you play quite a bit. Some of these additions are mechanical in the form of Fated Regions and Landmarks, while others are simple beautifications to the world generation.
Ways of War is the fifth expansion for Age of Wonders 4 and brings a touch of Eastern mythology to the game with Chinese Dragons, Jade Lions, and a new Oathsworn culture that devotes themselves to one of three decrees.
Eldritch Realms is the fourth expansion for Age of Wonders 4, and despite the fact that it doesn’t add a new culture, it’s still one of the biggest yet. It brings a new and unique ruler type in the form of an Eldritch Sovereign. A voidlike being with powerful spell casting via the use of thralls. A dangerous new risk versus reward map layer called the Umbral Abyss. It also adds a few new tomes, cosmic events, and more.
Primal Fury is the third expansion for Age of Wonders 4 and adds a brand new culture, The Primal Culture. Much like Dragon’s Dawn, Primal Fury is on the smaller (and less expensive) side of DLC expansions. It doesn’t bring any new story realms, but the handful of things it does add expands Age of Wonders 4 in pleasant ways.