@EventHandler
	public void onInteract(PlayerInteractEvent event){
		Block block = event.getClickedBlock();
		Action action = event.getAction();
		Player p = event.getPlayer();
		if((action == Action.LEFT_CLICK_BLOCK) && (block.getType().equals(Material.OBSIDIAN))){
			if(p.getItemInHand().getType().equals(Material.DIAMOND_PICKAXE)){
				p.addPotionEffect(new PotionEffect(PotionEffectType.FAST_DIGGING, 160, 3));
			}
		}
	}