In beta patch #8, the void ray's Prismatic Beam no longer charges up, the cooldown of the weapon was improved, and it no longer did bonus damage to massive units. Instead, the Prismatic Alignment upgrade increased damage to armored units by 6 for 20 seconds, with a 1 minute cooldown, and this does not stack with upgrades.
↑Warp Rays, also known as Void Rays now, are especially good against high hit point units, as well as buildings.
Often, the strategy that sees the most Void Ray use is against Zerg, using these units to do surprise attacks or joint attacks. Many Protoss players who scout Zerg players going mass ground units, will fast tech to Void Rays in hopes to catch them without anti-air capabilities. Void Rays are also great to do an attack on their base while you have a diversionary force distracting them in another place. 2-3 Warp Rays could take out a Hatchery much faster than say that equivalent in resources of Mutalisks. Karune. 2008-09-29. Warp Rays. Battle.net StarCraft II General Discussion Forum. Accessed 2008-09-30.
↑Blizzard Entertainment staff. 2011-01-11. Patch 1.2.0 Now Live. Blizzard Entertainment. Accessed 2011-01-11.