Bonecrusher

Stone Dragon (Strike)
Level: Crusader 3, Swordsage 3, Warblade 3
Initiation Action: 1 Standard Action
Range: Melee Attack
Target: One Creature
Save: Fortitude Partial; see text

You deliver your attack, and your enemy's eyes jerk wide open in panic as his skeleton begins to fracture in hundreds of places.

You make a single attack against an enemy. If this attack his, you do an extra 4d6 damage. If the target fails a Fortitude save vs 13 + Strength modifier, all further strikes gain a +10 to confirm critical hits.