Effluvial Buildup is a Status Effect in Monster Hunter World (MHW). This effect reduces a Hunter's maximum Health. Effluvial Buildup is a Player-and-Ally only effect and cannot be inflicted on Monsters.
Effluvial Buildup Effect
Effluvial Buildup is caused by attacks from Vaal Hazak. At a certain point, the effect will trigger, causing maximum Health to be reduced by half its current value.
The effect can be recognized by this symbol: on the HUD
Monsters that can Inflict Effluvial Buildup