Summoner Spell Idea

Ready for the tank/bruiser/support player down votes :)

Hemophilia- Takes 100% damage received as a bleed, dealing 20% damage per second for 5 seconds. Lasts 5 seconds (last damage taken would be 5 seconds after the 5 second duration).

This is my idea for a summoner that would really help out the squishies. Right now the game is filled with not only carries that dish out loads of damage, but also bruisers and tanks that are competing damage-wise. So I am thinking the introduction of this summoner would really benefit squishies. Some of you may think that this would only be beneficial to Marksmen who can lifesteal after taking the damage, but if a mage were to use this they could use Zhonya's and negate most of the damage taken.