Just spotted this on mysmokingshop.co.uk:

“Viking Stormbreaker snuff is a blended snuff, made from high quality dark fired Virginia Seed leaf from the hugely popular Viking Dark and high quality flue cured bright Virginia leaf. Flavoured with Menthol, Eucalyptus and a gentle S.P. aroma very similar to Hedges and McChrystals. 20g Tin.”

Interesting name and description, but those badly sealed tins are dealbreaker for me. They could at least use a tape for preserving like on the smaller tins.

This appears to be a flavoured version of Thors Hammer

Also, looks just like WoS Singleton’s Super Cool, which is a pure menthol on a dark, smoky base.