Martial Style of the Dancer

This ancient style is passed down from generation to generation through only the greatest of warriors. This Martial Style focuses on the user and their motions and flow, almost making their moves seem as though they are dancing. Once they have taken their stance, all melee weapon attacks have a +2 to hit. If the user is wielding a Versatile or Finesse based weapon, this is increased to a +4. 

For every melee attack that is made by the user, they gain a stack of Elegance. At 5 stacks of Elegance, the user enters the flow of combat and may perform the following abilities. at the consumption of their stacks of Elegance. Stacks can only be gained during the user's turn. Killing an enemy grants 2 stacks Elegance 

Blade's Court - The user's attacks gain Double Strike for this turn. Double Strike doubles the damage dies of the attack being made.

Executioner's Waltz - The user speed drastically rises, increasing movement speed by 30ft for this turn. When the user has a target within 10ft of them, they make an attempt to execute the target. If the target is below 30% of their HP, they are executed is they do not succeed a DC 21 Constitution Save. If they are not, that take damage equal to half of your maximum HP.

Death's Tempo - The rhythm of the user shifts chaotically. During this transition, the target is slashed at various points on their body. The damage dealt causes the target to become vulnerable to One of the following for 2 turns depending on how the user cuts. Vertical Slice - Vulnerable to Slashing, Horizontal Slash - Vulnerable to Piercing, Cross Carving - Vulnerable to Any 1 element. 

If the target was immune to any of the damage types provided, they are resistant instead. If they were already resistant, then they lose their resistance for the duration.