You can attack twice, instead of once, whenever you take the Attack action on your turn.

When you take the Attack action, you can attack three times instead of once.

When you finish a Short Rest, you can regain hit points as a bonus action by using your Second Wind, restoring 1d10 + your Fighter level hit points. You can use this feature twice between Long Rests at this level, and regain all uses when you finish a Long Rest.

You gain proficiency with all armor, shields, simple weapons, and martial weapons. Your training makes you a capable front line combatant from the start.

Choose weapon masteries for weapons you are proficient with. You can apply mastery properties to those weapons and switch prepared masteries when you finish a Long Rest.

If you fail an ability check, you can expend a use of Second Wind to add 1d10 to the roll, potentially turning failure into success.

You can take one additional action on your turn. Once you use this feature, you must finish a Short or Long Rest before you can use it again. At level 15, you can use it twice between rests.

Choose the Champion subclass. Your martial prowess is honed toward reliable critical hits and athletic excellence.

Your weapon attacks score critical hits on a roll of 19 or 20.

You add half your proficiency bonus, rounded up, to any Strength, Dexterity, or Constitution check you make that does not already include your proficiency bonus, and your jump distance increases. You also gain a burst of speed after initiative is rolled.

You gain an Origin feat from your background. For this character, the feat is Magic Initiate, granted by the Acolyte background.

You gain the benefits of a second Fighting Style.

You can reduce a failed saving throw by expending a use of this feature, potentially turning it into a success. You regain uses when you finish a Long Rest.

Your martial skill becomes inspiring to allies, and you excel at driving a fight forward when you are in the right position.

You gain an additional use of Indomitable.

Your critical hit range expands again, making your decisive blows even deadlier.

You and your companions can expect to receive free healing and care at a temple, shrine, or other place of worship dedicated to your faith, though the exact aid depends on the temple and the situation.