ブラックエフェクト

on rightclick holding a enchanted book:
	if name of player's tool is "&0&lブラックエフェクト":
		{%player%::c} is not set
		player's level progress is larger than 0.2
		reduce the player's level progress by 0.2
		play sound "entity.bat.ambient" with volume 10 and pitch 1 at player for players in radius 3 of player
		show 50 Spell Witch particles at player offset by 3, 3, 3 with speed 0
		loop players in radius 3 around player:
			if loop-player is not player:
				apply potion of Blindness of tier 1 to loop-player for 3 seconds
				play sound "ambient.cave" at loop-player with pitch 1 volume 1