Rev 16:2  And the first went, and poured out his vial upon the earth; and there fell a noisome and grievous sore upon the men which had the mark of the beast, and upon them which worshipped his image. 

Rev 16:10  And the fifth angel poured out his vial upon the seat of the beast; and his kingdom was full of darkness; and they gnawed their tongues for pain, 

Rev 18:23  And the light of a candle shall shine no more at all in thee; and the voice of the bridegroom and of the bride shall be heard no more at all in thee: for thy merchants were the great men of the earth; for by thy sorceries were all nations deceived. 
Rev 18:24  And in her was found the blood of prophets, and of saints, and of all that were slain upon the earth. 

sorceries
From G5332; medication (“pharmacy”), that is, (by extension) magic (literal or figurative): - sorcery, witchcraft.

I don't want to take the chance that it is :)