The shock claim, from one of the world's leading authorities on the death cult, comes amid fears of a New Year's Eve terror plot in London and other major world cities.
Islamic State has carried out more than 50 attacks in 18 countries that have killed 1,100 people and injured 1,700 since it declared its caliphate in 2014.
And next year will see a huge increase in both the number and scale of major terror attacks, according to Dr Theodore Karasik, a Gulf-based analyst of regional geo-political affairs who has extensively studied ISIS's behavior.
He warned: "ISIS’s media operation is taunting its enemy to come to fight their Final Battle.
"But first, it wants to show its global reach with zeal...from cells, to lone wolves, to bedroom jihadists – to target landmarks and crowds in dozens of countries across the world."
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