HC Efficacy Reduction

HC Efficacy Reduction is a debuff that reduces the amount of HP healed from collected Heart Crystals (HC). These debuff effects stack subtractively with other HC Efficacy effects, such as from Leader Skills, Extra Skills, Spheres, Elgifs and SP Enhancements.

Its opposite counterpart is HC Efficacy.

Formula
Amount Healed = Total REC * (100% + HC Effectiveness Multiplier) / RandomBetween(3.0, 4.2)

Mechanics
For every HC obtained, HC Efficacy Reduction heals less HP.

For example, Lord-type max-leveled Kaiser Glowy is afflicted with Grand Mitrailleur Serin's HC effectiveness reduction debuff on her SP-enhanced SBB.
 * Assuming no imps were fused, Kaiser Glowy’s Rec stat is 907.
 * Without Serin's debuff active, Kaiser Glowy will heal anywhere between 215~302 HP.
 * With Serin's debuff active, Kaiser Glowy will heal anywhere between 151~212 HP.