Spark Boost based on HP

Spark Boost Based on HP is an effect that triggers a spark damage increase based on an HP threshold. This is usually expressed in the format “x% spark damage increase when HP is below/above x%.” This stacks normally with other forms of Spark Boost, but stacks separately from element-specific spark damage boosts.
==Examples==
Orochi Iori’s Leader Skill offers a 200% boost to spark damage when HP is below 90%.
Imperial Ruin Zegstia’s Extra Skill provides an 80% boost to Spark damage to self when HP is over 50%.