@Override
    public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ)
    {
        if(!world.isRemote)
        {
            TileVoidaicAltar altar = (TileVoidaicAltar) world.getTileEntity(pos);

            if(!player.getHeldItem(hand).isEmpty()
                && player.getHeldItem(hand).getItem() != ModItems.WHITEWOOD_STAFF)
            {
                if(!player.isCreative())
                {
                    if(altar.handler.getStackInSlot(0).getCount() < 1)
                        altar.handler.setStackInSlot(0, player.getHeldItem(hand).splitStack(1));

                    if(altar.handler.getStackInSlot(1).getCount() < 1 && altar.handler.getStackInSlot(0).getCount() > 0)
                        altar.handler.setStackInSlot(1, player.getHeldItem(hand).splitStack(1));

                    if(altar.handler.getStackInSlot(2).getCount() < 1 && altar.handler.getStackInSlot(1).getCount() > 0)
                        altar.handler.setStackInSlot(2, player.getHeldItem(hand).splitStack(1));

                    if(altar.handler.getStackInSlot(3).getCount() < 1 && altar.handler.getStackInSlot(2).getCount() > 0)
                        altar.handler.setStackInSlot(3, player.getHeldItem(hand).splitStack(1));
                }
                else
                {
                    ItemStack stack = new ItemStack(player.getHeldItem(hand).getItem(), 1, player.getHeldItem(hand).getMetadata());

                    if(altar.handler.getStackInSlot(0).getCount() < 1)
                        altar.handler.setStackInSlot(0, stack);

                    if(altar.handler.getStackInSlot(1).getCount() < 1 && altar.handler.getStackInSlot(0).getCount() > 0)
                        altar.handler.setStackInSlot(1, stack);

                    if(altar.handler.getStackInSlot(2).getCount() < 1 && altar.handler.getStackInSlot(1).getCount() > 0)
                        altar.handler.setStackInSlot(2, stack);

                    if(altar.handler.getStackInSlot(3).getCount() < 1 && altar.handler.getStackInSlot(2).getCount() > 0)
                        altar.handler.setStackInSlot(3, stack);
                }
            }
            else if(player.getHeldItem(hand).isEmpty())
            {
                if(altar.handler.getStackInSlot(3).getCount() > 0)
                    player.inventory.addItemStackToInventory(altar.handler.getStackInSlot(3));

                if(altar.handler.getStackInSlot(2).getCount() > 0 && altar.handler.getStackInSlot(3).getCount() < 1)
                    player.inventory.addItemStackToInventory(altar.handler.getStackInSlot(2));

                if(altar.handler.getStackInSlot(1).getCount() > 0 && altar.handler.getStackInSlot(2).getCount() < 1)
                    player.inventory.addItemStackToInventory(altar.handler.getStackInSlot(1));

                if(altar.handler.getStackInSlot(0).getCount() > 0 && altar.handler.getStackInSlot(1).getCount() < 1)
                    player.inventory.addItemStackToInventory(altar.handler.getStackInSlot(0));
            }
            else if(player.getHeldItem(hand).getItem() == ModItems.WHITEWOOD_STAFF)
            {
                if(!altar.isCasting()) altar.startCasting(player);
                else altar.stopCasting();
            }
        }

        state = world.getBlockState(pos);

        world.notifyBlockUpdate(pos, state, state, 2);

        return true;
    }