People can heal inside kindred's ult when they fall to 10% health. :'( [GAMEPLAY]
While duelling an olaf inside a kindred ult, I saw "Invulnerable" as I was attacking him. Dead in the center of the ult, he was healing past 10% health. This is inconsistent with the description of kindred's ult: "ACTIVE: Lamb blesses the ground under herself for 4 seconds. While inside the area, all units (including champions, minions and monsters; both allied and enemy) cannot be reduced below 10% of their maximum health. Units in the area who reach the threshold cannot be healed while within for the remaining duration."
You can reproduce this with any character that has vamp on their abilities.