User blog comment:Valeth/Artoria Pendragon (Grand)/@comment-25848535-20190504195235/@comment-27971189-20190506081140

Yes, it only happened once (as it forces enemy to end their turn); as you noted on your example, indeed, it wears off if enemy just buff themselves (no attack, no debuff) and she still permanently lose 2000 HP due to her passive.

Oh, also, since she's unaffected by Command Spell effect it made her immune to enemies' CS effect as well as ours; players can't heal or charge her with CS, and she is not among Servants revived when using full revive from CS.

Nah, its not that big, I just mish-mash all Artorias that's not joke character into one. LOL.