User blog comment:Emptylord/Custom Champion - Ferox the Deathless Prince (2013)/@comment-4068613-20130528044910/@comment-4068613-20130530235527

The operative term was "barrier". Lux's, Karma's, Lee Sin's absorption shields, Locket of the Iron Solari and Liandry's Torment's actives. No other champion I know of has a non-damage health-draining effect that can actually kill them.

So even if he had 2000 worth of Absorption Shield from Barrier and similar effects, he could still die from health loss. This is the only champion I know of that can do that.