Very accurate. Have you SEEN how strong Galarian Corsola is with an Eviolite?

Those purple-energy spikes are the animation that plays when you used Curse.
One Curse cuts your HP to half. Two Curses will make you faint.

CURSE-ola, indeed.

It's also probably one one of the nastiest statuses a ghost type can inflict- even a toxipex would get worn down in pretty short order if they can't switch out. No need for two- the one will do the trick with patience.