User blog comment:Pacpac1997/Possible New Debuff Kind: Hp Freeze/@comment-4434378-20120623020306

Now this would be a cool concept for a champion ability in reverse. Where you could prevent an ally from taking damage until the ability ends (like Kayle ult, but you get smited at the end). DotA has Kunkka's ship, and it would be a cool lifesaver ability.

So like: Ashe gets hit with the defensive spell, gets nuked for 2000 damage, but remains at full health for ~5 seconds, and then at the end takes the 2000 damage, at her current Armor/MR values (yay Soraka/Galio/Sona!).