Dreadnought

Unstoppable

When you choose this archetype at 3rd level, your sheer strength and power makes you unstoppable. When you make an attack roll using Strength, you can gain a +10 bonus to the roll. You make this choice after you see the roll, but before the DM says whether the attack hits or misses.
Alternatively, when you make a Strength check, you can gain a +10 bonus to the check. You make this choice after you see the roll, but before the DM says whether the check succeeds or fails.
You can use this feature a number of times equal to your Strength modifier (minimum of once), but only once per turn, and you regain all expended uses of it when you finish a long rest.

Thick Skinned

By the time you reach 7th level, your experience and thick skin (and likely excessive scarring) has made you more durable. When you gain this feature, your hit point maximum increases by 14. Every time you gain a level in this class thereafter, your hit point maximum increases by 2.

Additional Fighting Style

At 10th level, you can choose a second option from the Fighting Style class feature.

Legendary Stamina

Starting at 15th level, you can focus your physical durability to shrug off damage and other effects. Whenever you make a Strength, Dexterity, or Constitution saving throw, you can gain a +10 bonus to the roll. You make this choice after you see the roll, but before the DM says whether you succeed or fail.
Once you use this feature, you can't use it again until you finish a short or long rest.

Survivor

At 18th level, you attain the pinnacle of resilience in battle. At the start of each of your turns, you regain hit points equal to 5 + your Consitution modifier if you have no more than half of your hit points left. You don't gain this benefit if you have 0 hit points.