• Recipe: Flask of Chromatic Resistance
• Requires Alchemy (300)
• Use: Teaches you how to make a Flask of Chromatic Resistance
• [Flask of Chromatic Resistance]
• Requires Icecap (7) Mountain Silversage (3) Black Lotus (1) Crystal Vial (1)
• 1 Charges

Flask of Chromatic Resistance increases your resistance to all schools of magic by 25 for 2 hrs. It counts as both a Battle and Guardian elixir, and the effect persists through death.

Source

• Rare drop from Gyth, a boss in Blackrock Spire.
• Purchased from the Lower City quartermaster with Exalted reputation.

Patch changes

Patch 2.4.2 (2008-05-13): The Lower City reputation item, Recipe: Flask of Chromatic Resistance, is now bind on pick up. 
Patch 3.0.8 (2009-01-20): All flasks no longer require an Alchemy Lab to be created. 

External links

Gyth:

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB

Lower City:

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB