In this guide, you will come to know where to farm for Vermillion Storm in Warframe.
Vermillion Storm can drop as a completion reward for completing Rathuum on a certain mode on Sedna.
The specific Sedna node you will want to be running is Nakki.
Like with all the other mods in this reward pool, Vermillion Storm has a relatively low drop rate from this mission. It will take you some time before you get the mod unless you’re super lucky; you have to prepare yourself for the grind if you go for the mod.