Board Thread:Warhammer 40k General Discussion/@comment-203.134.114.240-20130706042929/@comment-3258762-20130712223255

Refined (Flamer) Promethium also ignites by oxygen, even so small amounts as that carried in the blood of a human, meaning that, unlike conventional flamethrowers, whose flames stick to the target, Promethium fire is nourished by the biological material it consumes, making it worse and near impossible to put out.