Heavy Weapon Mastery

A roaring oniborne twirls a greataxe in the air before letting it fall with the weight of a mountain, cleaving through four men in a single blow. You can be fast, you can be clever, but in the end, size matters.

Heavy Property.
Small creatures have disadvantage on attack rolls with heavy weapons. A heavy weapon’s size and bulk make it too large for a Small creature to use effectively.

Weapons With The Ammunition Property:
-Glaive, Greataxe, Greatsword, Halberd, Maul, Pike, Tower Shield.

Tier 1 Advanced Techniques.

Colossal Strength

Prerequisites: martial level 2, proficiency with at least one Heavy weapon
If your Strength score is 15 or higher, being Small or Tiny doesn’t impose disadvantage on your attack rolls with Heavy weapons.

Executioner

Prerequisites: martial level 2, proficiency with at least one Heavy weapon
When you hit a prone creature with an attack using a Heavy weapon, the weapon deals one extra die of damage. Additionally, your critical hit threshold for such attacks is reduced by 1.

Hammering Blow

Prerequisites: martial level 2, proficiency with at least one Heavy weapon
When you hit a creature no more than one size larger than you with a Heavy weapon and roll the highest result on the weapon’s damage dice, you can knock the target prone.

Tier 2 Advanced Techniques.

Superior Strikes; Heavy

Prerequisites: martial level 6, a tier 1 Heavy advanced technique
You can perform a superior strike with any weapon that has the Heavy property.

Tier 3 Advanced Techniques.

Cleave

Prerequisites: martial level 10, a tier 2 Heavy advanced technique
When you reduce a creature to 0 hit points with a melee attack roll using a Heavy weapon, you can choose to carry over any excess damage to one other creature within your reach, provided the initial attack roll would hit the target. If you reduce that creature to 0 hit points, you can repeat this process against another target until there is no excess damage remaining.

Dauntless

Prerequisites: martial level 10, a tier 2 Heavy advanced technique
When you roll a 1 on a bludgeoning, piercing, or slashing damage die when you hit with a melee attack with a Heavy weapon, treat that 1 as the maximum roll for that die.

Tier 4 Advanced Techniques.

Concussive Blow

Prerequisites: martial level 14, a tier 3 Heavy advanced technique
When you score a critical hit on an attack with a Heavy weapon, the target also suffers the effect of the confusion spell until the end of its next turn.

Staggering Blow

Prerequisites: martial level 14, a tier 3 Heavy advanced technique
When you hit a creature no more than one size larger than you with a Heavy weapon, you can push the target up to 10 feet directly away from you. Creatures immune to the grappled condition are immune to this effect.