At 5th level and every 5 levels thereafter, you boost four different ability scores. You can use these ability boosts to increase your ability scores above 18. Boosting an ability score increases it by 1 if it’s already 18 or above, or by 2 if it starts out below 18.

In addition to the ancestry feat you started with, you gain an ancestry feat at 5th level and every 4 levels thereafter.

Hours spent training with your preferred weapons, learning and developing new combat techniques, have made you particularly effective with your weapons of choice. Choose one weapon group. Your proficiency rank increases to master with the simple and martial weapons in that group, and to expert with the advanced weapons in that group. You gain access to the critical specialization effects (page 283) of all weapons for which you have master proficiency.

Whether taking stock of an enemy army or simply standing guard, you excel at observing your foes. Your proficiency rank for Perception increases to master. In addition, you gain a +2 circumstance bonus to Perception checks for initiative, making you faster to react during combat.

You’ve learned how to inflict greater injuries with the weapons you know best. You deal 2 additional damage with weapons and unarmed attacks in which you are an expert. This damage increases to 3 if you’re a master, and to 4 if you’re legendary.

Through your experience in battle, you can prepare your tactics to suit different situations. When you make your daily preparations, you gain one fighter feat of 8th level or lower that you don’t already have. You can use that feat until your next daily preparations. You must meet all of the feat’s other prerequisites.

Your body is accustomed to physical hardship and resistant to ailments. Your proficiency rank for Fortitude saves increases to master. When you roll a success on a Fortitude save, you get a critical success instead.

You have spent so much time wearing armor that you know how to make the most of its protection. Your proficiency rank for light, medium, and heavy armor, as well as for unarmored defense, increase to expert. You gain the armor specialization effects of medium and heavy armor.

You’ve practiced your techniques to make them harder to resist. Your proficiency rank for your fighter class DC increases to expert.

You’ve learned fighting techniques that apply to all armaments, and you’ve developed unparalleled skill with your favorite weapons. Your proficiency ranks for simple and martial weapons increase to master. Your proficiency rank for advanced weapons increases to expert. You can select one weapon group and increase your proficiency ranks to legendary for all simple and martial weapons in that weapon group, and to master for all advanced weapons in that weapon group.