Flame Blossom is a light armor set. When you deal damage, you have a 10% chance to summon a line of flame that moves forward after 1 second, dealing 8000 Flame Damage to any enemy in its path. This effect can occur once every 10 seconds.
The Flame Blossom set is part of the Horns of the Reach DLC. It drops in Bloodroot Forge in Craglorn. Each set item is bound on pickup. You can acquire light armor, weapons and jewelry of this set in the Bloodforge motif style.