This is a fruit of few discussion and inner thoughts.
Authority skills:
1. For 20% of total auth, temporary boost to one of selected realm buffs.
2. For 10% of total auth, make a king decree that during next season, one animal is on the "protection" list and will spawn less frequently, but during next, next season it reappears with normal spawn frequency but quality increased for that season. As consequence, other animals might spawn more during protection period?
3. For 50% of auth locked until effect ends, king decree that it is a season for X crop next summer is on demand, causing it's speed and quality/quantity grow in numbers for entire summer.
3. For 50% of auth locked until effects ends, king decree to make the X metal on demand, making all the ore of matching type, increase quantity during mining and greater chance for ore to turn into metal during smelting.
Everything above makes item names have distinctive icon or name in different color. Those bonuses are however temporary, diminishing by 25% every next season, unless were used in crafting recipe. Tools, anvils and such still however, remain the diminishing bonus, but curiosities, food, weapons and stuff remain the bonus quality for as long as exist.
I hope You get the idea
Cairn placement:
Disconnecting a cairn, seamark and such objects from the kingdom (no clear connection between coronation stone and object), renders it easy to break without challenges OR allows the option for capture. Cairn becomes captured if another kingdom cairn overlaps it while it is clearly disconnected from it's origin. This grants a temporary % buff of the initial kingdom to capturing kingdom for several days. (for example Kingdom A has +10 farming and 30% flax grow speed, Kingdom B after capturing gains +4 farming and %10 flax grow which is marked blue in kingdom tooltip)
Challenging cairns:
If there's cairns overlaping each other, You should be able to bash all overlapping cairns, to avoid spamming them.
Destroying a lot of carins should allow enemy kingdom to have faster siege time for the village and claims that connects to coronation stone (starting for kingdoms that have ~10 cairns or so).