Champion of the Perishing
Champion of the Perishing had 2 health. Liliana also had out 2 decaying Ghouls that had not yet died the first time. I as Chandra targeted Champion with Flame Shot, so he took 3 damage to -1. Then instead of dying, he regained health when the Ghouls were resummoned. So then he had 1 health and +2 power. He should have died.
Uperkratos#90490 shared this idea