now that one of the most unimpactful resolve tree keystones has been tackled can we look at undying?

yknow i was thinking what if that one proc's of any form of cc and no longer steals health from enemies but instead becomes a form of sustain and damage reduction from that target?

so lower their damage by X% for 4 seconds and heal for X% of your hp over 4 seconds? (so silence's as well so we do not alienate garen)