public void cobraUse(PlayerInteractEvent event, PlayerInteractEntityEvent entityEvent) {
    Player player = event.getPlayer();
    Player clicked = (Player) entityEvent.getRightClicked();

    if (player.getInventory().getItemInMainHand().isSimilar(customItems.cobraTooth())) {
        if (entityEvent.getRightClicked().getType().equals(EntityType.PLAYER)) {
            player.sendMessage("here 2");
            clicked.addPotionEffect(new PotionEffect(PotionEffectType.POISON, 100, 4));
            player.sendMessage("here 3");
        }
    }
}