[Multiverse-Core] "Multiverse-Core v4.0.0-b766" has registered a listener for org.bukkit.event.entity.EntityCreatePortalEvent on method "public void com.onarandombox.MultiverseCore.listeners.MVPortalListener.entityPortalCreate(org.bukkit.event.entity.EntityCreatePortalEvent)", but the event is Deprecated. "Server performance will be affected"; please notify the authors [Rigby, fernferret, lithium3141, main--, dumptruckman]

Duplicate of Multiverse/Multiverse-Core#2000 and this belongs to MV-Core.