Electricity
So 1:00 AM Saturday Russia cuts power supplies to Finland in retaliation to the announced request to join NATO.
Finland's power included 14% of the total supply from Russia. The electric generation is diversified, and can also tap power from Sweden. Putin will have caused Finland to bring forward the termination of imports from Russia of electricity, coal, oil, and gas. Effectively Russia has again sanctioned itself and confirmed they are an unreliable trading partner. At this rate they will be hardpressed to export anything other than vodka, Matryoshka dolls and snow globes of St Basil's.