Parameter Boost based on HP remaining

Parameter Boost based on HP remaining is a passive effect that boosts a parameter stat by a specified amount relative to the unit's HP remaining. This effect can be stacked with itself.

Examples of stacking

 * A unit under Scorching Halberd Lars and Infernal Pyre Rugahr's Leader Skill would have 20%~180% Atk buff relative to it's HP remaining, with 180% at full HP.