Grant a random Healing Effect to self for 2 turns when you take damage. 50% Chance to grant a random Healing Effect to a random ally for 2 turns when you take damage.
I think this is working as it supposed to be, since Heal shield is can be counted as a Healing effect here.
When you use a multi-hitter vs a Sacred wearer, you almost guarantee to give the enemy heal shield. Workaround? Well, heal block, or block beneficials / perfect corruption, maybe crave. Some use Gunner Hierophant too.
But as I've stated in another thread, never seen anything else that can override everything possible in the game: Killer's passive. I saw it by first hand, his passive even overrides Musashi's cosmic talisman.
-About Musashi's cosmic talisman -- it is needs to be fixed as well. In my experience, endless turns triggers especially when he is the last standing one in his team.