There is a glitch with the enshrouding mist that it prevents the creature from being destroyed by any means instead of just preventing damage.
I’ve encountered that problem multiple time in QB and tried different ways to kill it (i.e. Scour from Existance, Ob Nix’s “Tormant” ability, reave soul and so on).
Please look into it. I enjoy playing that card myself but I still find it an unfair disadvantage that it makes a creature indestructible.
Thank you.