onPlayerDeath 01

if (event.getSource().equals(ModDamageSource.causeBoundPlayer(player))) {
                        BoundPlayersList.removeUsername(bound.getUUID());
                        serverPlayerEntity.removePotionEffect(LifeBindingPotion.LIFE_DAMAGING_EFFECT.get());
                    } else {
                        if (player.getServer().getPlayerList().getPlayerByUUID(bound.getUUID()) == null) {
                            BoundPlayersList.setUsername(bound.getUUID(), bound.getName());
                        }

                        /** Adds potion effect to bound player. */
                        serverPlayerEntity.addPotionEffect(new EffectInstance(LifeBindingPotion.LIFE_DAMAGING_EFFECT.get(), 150));
                        /** Removes potion from player who had died/triggered the event. */
                        player.removePotionEffect(LifeBindingPotion.LIFE_DAMAGING_EFFECT.get());
                    }