You can deliver a special heavy blade attack that deal extra damage.
Prerequisite(s): Weapon Focus, BAB +3.
BENEFIT
You gain a TP Pool, which begins at 0 and maximizes at 30. For each successful heavy blade attack you make or get struck by a melee or ranged attack, you gain 1 TP. At 10 TP or more, you may spend all TP to deliver a special heavy blade attack that takes a place of an attack of a full-attack or just a single attack. This attack deals damage as normal + 2d6 points of damage. At 20 TP or more, you may spend all TP to deal + 4d6 points of damage. At 30 TP, you may spend all TP to deal + 6d6 damage. This TP Pool lasts until you sleep for the night, in the morning, it empties out. In addition, your heavy blade attacks deal an additional point of damage for each weapon skill feat in this line that you have.