There are a few factions like that. In fact, the group that you are all a part of contracts with them frequently ;).
The three big ones are The Dawn's Spear, The Forest Lords, and The Grains of Sand. These are the only three groups that would be considered "assassin's" guilds of a sort. There are numerous thieves guilds throughout the world that have their own assassins on retainer, of course. But these three are the well-known groups.
The Dawn's Spear
A group of assassins in service to the Empress herself. They serve the Gilded Throne and are trained to that position from birth. All of them are removed from their parents upon birth to be raised by Bloodflower retainers in the Glorious Temple of Light. They are the anomaly within worshipers of the Light facet. They balance a pure faith in Light while courting the Dark. The Empress deploys them at will to ensure that the empire is kept safe. Needless to say, they've been a bit busy as of late.
The Forest Lords
A group of primarily Wood Elves from Telluria. They are the reason The Court of the Three Lords isn't located IN the Eastern Copse. They typically operate for hire to oppose those that would harm Delmarra. They are not a massive organization, but they are effective. They are known in particular for their habit of leaving their quarries with a mouthful of acorns and a cluster of dead leaves on their faces.
The Grains of Sand
This group operates on the belief that a true assassin is like a grain of sand. They blend in perfectly and are indistinguishable from anyone else around them. However, when placed in a sensitive area, they can cause significant damage. While they operate primarily along the desert coastline of both Telluria and Markindale, their services are routinely pulled across kingdom borders because of how easily they blend. They are the most numerous of the major assassin groups and the most likely to seek out members from other areas of the world other than their base of operations. They are odd in that everyone knows OF them, and knows generally how to reach them. However, no one claims to know an ACTUAL Sander.
