Fiery Hand
From A Wiki of Ice and Fire
The Fiery Hand, known also as The Lord of Lights sacred soldiers and defenders of the temple is a group of Warriors that protect the Red temple of R'hllor in the free city of Volantis. The Fiery hand are all Slaves of R'hllor and wear ornate armor over orange robes, they wield spears whose points are shaped as writhing flames.
There number is one thousand, never more, never less. There is a saying "a new flame is kindled for every flame that gutters out".