Everytime you use an attacking halberd skill that doesn’t miss nor get evaded, it gives 1 tornado lance stack. Max Stack is 10. However, you will lose half of the current stack every time you get hit, even if you can dodge(enemy's attack misses), evasion and invincibility Now they won't lose stack with iframe/evade, but dodge[miss] still lose stack!!!., Passive
100 sec(can be refreshed to 100s after you use hb attack skills).. Increase Critical damage by +(Skill level/5) per stack.. Increase Dodge/Flee by 10% per stack.. Increase Chance to trigger Additional Melee/Magic by (2.5 * stack * Skill Level/10)%, [Currently need confirmation with stack or skill level, probably just stacks i suppose. At max effect, this skill can reduce the decrease of Graze Stability penalty from -50% Final Stab into -40% Final Stab. Making it your graze dmg will fluctuate between 60% and 100% if you have 100% Final Stability], Increase your Graze Threshold by (8 * stack * Skill Level/10)%.
Halberd has a 20% base Graze Threshold.. If enemy got inflicted with Dazzled, then Hit Chance become MAX[(100 - (enemy flee - player accuracy) + MP/10) ; Base Graze Threshold * 2]. This Dazzled only takes base hb graze without Tornado Lance’s graze threshold increase buff.