Purifier adaptive BattleArmor was originally a Word of Blake design that incorporated advanced camouflage technology and the ability to mount spotting lasers or missile beacons.
         At the time of the Word of Blake invasion of Terra in 3058, ComStar scientists at the Sandhurst Royal Military College were working on an infantry uniform that used mimetic--color-shifting--technology. ComStar believed that this research was destroyed when elements of the Word of Blake's Task Force Steel overran the college, despite the valiant efforts of the Sandhurst Training Regiment. ComStar believed the technology had been lost until August of 3061, when the Word of Blake Militia unveiled a new BattleArmor prototype that incorporated the mimetic technology.

         Word of Blake engineers had learned a great deal about BattleArmor construction and development during their joint effort with the Free Worlds League Military to produce the Achileus light BattleArmor, and much of that knowledge is reflected in the Purifier. Like the Achileus, the Purifier features armor-composite sheaths, laid over a myomer musculature. Unlike the Achileus, the Purifier contains dozens of micro-cameras tied to a central processing unit buried in the upper back of the chest plate. These micro-cameras continuously feed images of the surrounding environment to the computer, which then sends electrical impulses to a chemical composite impregnated in the Purifier's armor sheaths. These impulses control the color of the chemical composite. As the BattleArmor moves, the computer processor receives feeds from the micro-cameras and manipulates the flow of current to each part of the suit, so that each section changes color to blend in to the surrounding terrain.
         Although the system can shift the Purifier's coloring quite rapidly, the speed is limited so the processor cannot properly camouflage the unit if the surrounding terrain changes too quickly or too often. This has no effect when the Purifier is moving at slower speeds. But if the BattleArmor moves at its maximum speed, the mimetic effect actually makes it easier to spot, as the rapidly shifting colors make the Purifier stand out rather than blend in. Regardless of this drawback, the mimetic adaptation was deemed a success.
         Once the armor had been perfected, the Word of Blake tested several different weapon systems for use with the Purifier. Trading on their close ties to the FWLM, the Word of Blake secured shipments of the League's new extended-range small laser for inclusion on the Purifier. To take advantage of their access to the League's new long-range missile submunitions, the Purifier's designers constructed the BattleArmor with the capability to accommodate a compact TAG system; this system proved very effective when used in tandem with the FWLM's new semi-guided long-range missiles, and with guiding in nuclear divices during the Jihad. Word of Blake engineers further improved the design's targeting capabilities by producing a compact NARC missile beacon to mount on the new BattleArmor. This addition makes the Purifier a powerful missile spotter, though the bulky Narc unit does limit the suit's mobility until the beacon is fired and the empty launcher discarded.

         Originally used only by the Word of Blake, during the Jihad ComStar captured enough working copies of the design to reverse engineer it and begin production of their own. With the Word of Blake now dead and gone, all remaining Purifiers are owned only by ComStar where their use is carefully limited.