Lasting Frost is a paragon tier feat available to characters level 11 or above. Once per turn, when a character with the Lasting Frost feat hits a target with a cold power, the first target hit gains vulnerable cold 5 after the power resolves. The vulnerability lasts until the end of the character's next turn.[PH:203][U:3/2010] The March 2010 update limited Lasting Frost to applying to only the first target hit by a cold power per turn, and clarified its timing.