Veiled Alliance
From UTRPG
The Veiled Alliance is faction of preservers found in each city (although they don't coordinate with each other). Essentially the only way to learn to preserve is to be picked up by the Veiled Alliance, although on occasion private tutoring is available. (Even then, said tutor is probably a Veiled One, they're just not telling you!)
The Veiled Alliance serves to "preserve" preserving magic, generally from the ignorant populace which would summon the templars on them with cries of "defilers!" Veiled Alliance members don't have to be arcane spellcasters, but most of the theme powers involving hiding arcane magic from others, so the theme itself makes little sense for anyone else.
While they're not really competing with the sorcerer-kings for plants, they're still enemies of the sorcerer-kings. As a result, the Veiled Alliance has to be secretive lest they be destroyed by the templars. In some cities, the templars have recently decimated or even infiltrated the Alliance. The Alliance forces new magical members to undergo the "green" test to prove the new member is a preserver (under the theory that defilers are addicted and cannot preserve). This foolproof method has kept out large numbers of defilers, who are usually quickly and messily executed.
