Sentence:  Blast after blast, fiery outbreak after fiery outbreak, like a flaming barrage from within,...most of Edison's grounds soon became an inferno. As though on an <WSD>incendiary</WSD> rampage, the fires systematically devoured the contents of Edison's headquarters and facilities. 
Meaning of the word marked with <WSD> tags:  Capable of, or used for, or actually causing fire.