The three methods will all find places in the World Book of Atrocities.
According to a report by Mail Online, one of the best I am execution methods, involved locking condemned prisoners in a metal cage and then lowering them into a swimming pool to drown.
In another footage of the video, said to have been filmed in the ISIS stronghold of Mosul, prisoners are locked in a car, and then blown up with a rocket grenade.
And in yet another footage, prisoners are strung together with explosive necklaces and then detonated.
The brutal killings Will Make One Wonder, Which God followers of ISIS are worshipping.
Here are some of the images as published by Mail Online:
