Fighter

Jumping Combatant

Beginning when you choose this archetype at 3rd level, you can cast the "Jump" spell, targeting this spell on yourself. Your CON is used to cast this spell and can be cast a number of times equal to your Constitution Modifier (minimum of once). Uses refresh after you take a long rest.

In addition, when ever you jump in combat as a form of movement, you do not provoke opportunity attacks.

Airial Strikes

Starting at 7th level, when you make a successful melee attack after jumping at least 10 feet towards a target, you can roll one extra damage dice of the same type as the weapon used to make the attack.

In addition, when you make a running long jump, the distance you can cover increases by a number of feet equal to your Strength modifier.

Large Targets

At 10th level, you gain a +2 bonus to attack rolls you make to a creature one or more sizes larger than yourself. In addition, while fighting creatures of one or more sizes larger than yourself weapon attacks score a critical hit on a roll of 18–20.

Titanic Counter

When a creature within 5 feet of you, that is one or more sizes larger than you, hits or misses you with an attack, you can use your reaction to attack that creature immediately after its attack, provided that you can see the creature. If you attack in this way, you can roll one extra damage dice of the same type as the weapon used to make the attack.

Resiliant Determination

At 18th level, your detemination to slay your foe allows you to push yourself past your normal limits. If an attack by a creature that is one or more sizes larger than you would knock you unconsious, you can roll any number of your remaining hit dice and subtract the number from the creature's damage, leaving you prone with at least one hit point. You do this once per long rest.