Perks

Each king has a level. At the end of each run it will gain experience based on the number of years played, regardless of whether the run was successful or not. After a king gains enough experience it will level up, which unlocks a perk that can be assigned to one of the king's 9 perk slots. Perks are permanent bonuses that apply to every run. They can be reset at any time between runs.

There are 3 types of perks:

Universal perks, available to all kings.
King perks, available only to the chosen king.
Rainbow perks, available to all kings and unlocked every third level.

A new perk unlocks every time a king levels up, alternating between Universal and King perks with every level up. Additionally, every third level threshold reached for the first time (level 3, level 6, level 9, etc.) unlocks a Rainbow perk.

Before starting a run, up to 9 perks can be activated by placing them in slots from the pool of unlocked perks, with the option to unlock additional slots by assigning the Rainbow perk Expander.

The content below needs to be updated as it may not accurately represent what's currently in-game.
The following info is outdated with the patch 11 overhaul and needs to be reworked

Common Perks

The following perks are available to all Kings, with one perk from the list randomly unlocked at every level up.

Perk	Bonus per rank	Max rank
Expansionist	Start with +1 random unlocked plot	3
Fortifier	Towers deal 10% more damage	3
Lucky	Special cards are 10% more likely to appear in shops	3
Nurturer	All troops start with 10% more HP	3
Persistent	Receive 2 free re-rolls	3
Planner	Losing a life gives you +30 gold	3
Hoarder	Start with +1 random card from your king in hand	2
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2

The following perks are available to all Kings, with one perk from the list randomly unlocked upon reaching a level multiple of 3 (e.g. 3, 6, 9, et al).

Perk	Bonus per rank	Max rank
File:Perk Nationalist.png Nationalist	All adjacent king perks are applied +1 time	3

King-specific Perks

The following perks are available to the King of Nothing.

Perk	Bonus per rank	Max rank
Expansionist	Start with +1 random unlocked plot	3
Fortifier	Towers deal 10% more damage	3
Lucky	Special cards are 20% more likely to appear in shops	3
Nurturer	All troops start with 10% more HP	3
Persistent	Receive 2 free re-rolls	3
Planner	Losing a life gives you +30 gold	3
Hoarder	Start with +1 random card from your king in hand	2
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2

The following perks are available to the King of Blood.

Perk	Bonus per rank	Max rank
Cultist	Start with +1 Imp card in your hand	2
Pagan	Start with a Demon's Altar in a random corner plotwith +1 level	2
Summoner	All summons are 10% stronger	3
Expansionist	Start with +1 random unlocked plot	3
Fortifier	Towers deal 10% more damage	3
Ingenious	Your castle can now level up 3 more times	2
Lucky	Special cards are 10% more likely to appear in shops	3
Persistent	Receive 2 free re-rolls	3
Politician	+1 royal decree option	2

The following perks are available to the King of Greed.

Perk	Bonus per rank	Max rank
Nepobaby	Start with +20 gold	3
Oligarch	Start with +1 Vault card in your hand	2
Peddler	1 merchant purchase is free	2
Expansionist	Start with +1 random unlocked plot	3
Lucky	Special cards are 10% more likely to appear in shops	3
Persistent	Receive 2 free re-rolls	3
Planner	Losing a life gives you +30 gold	3
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2

The following perks are available to the King of Nature.

Perk	Bonus per rank	Max rank
Healer	Treant's attacks are 10% stronger per rank	3
Pollinator	Start with a Mycellium in a random outer plot with +1 level	3
Tenacious	Receive +1 Procreate card every time you lose a life	3
Lucky	Special cards are 10% more likely to appear in shops	3
Nurturer	All troops start with 10% more HP	3
Persistent	Receive 2 free re-rolls	3
Hoarder	Start with +1 random card from your king in hand	2
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2

The following perks are available to the King of Nomads.

Perk	Bonus per rank	Max rank

The following perks are available to the King of Progress.

Perk	Bonus per rank	Max rank
Admiral	Mothership's movement and attack speed are increased by 10%	3
Innovator	Start with +1 Reinforce card in hand	2
Opportunist	Receive +5 Gold for each level up	3
Expansionist	Start with +1 random unlocked plot	3
Lucky	Special cards are 10% more likely to appear in shops	3
Nurturer	All troops start with 10% more HP	3
Persistent	Receive 2 free re-rolls	3
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2

The following perks are available to the King of Spells.

Perk	Bonus per rank	Max rank
Mystic	Start with +1 random enchantment in hand	3
Ruthless	Castle attack has a 5% chance to insta-kill	3
Scholar	Libraries always start at level 2	1
Expansionist	Start with +1 random unlocked plot	3
Lucky	Special cards are 10% more likely to appear in shops	3
Persistent	Receive 2 free re-rolls	3
Planner	Losing a life gives you +30 gold	3
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2

The following perks are available to the King of Stone.

Perk	Bonus per rank	Max rank
Impervious	Losing a life gives you +2 Wallmaker cards	3
Tactician	Start with +1 random tower card in your hand	2
Warden	Stronghold starts with +1 level	2
Expansionist	Start with +1 random unlocked plot	3
Fortifier	Towers deal 10% more damage	3
Lucky	Special cards are 10% more likely to appear in shops	3
Persistent	Receive 2 free re-rolls	3
Ingenious	Your castle can now level up 3 more times	2
Politician	+1 royal decree option	2