If this card is in your GY: You can banish 1 other Zombie monster from your GY; Special Summon this card, but banish it when it leaves the field. A "Vendread" monster Ritual Summoned using this card on the field gains the following effect. You can only use each of the preceding effects of "Vendread Core" once per turn. ● Your opponent cannot target this card with card effects.
It's not the "card effect" that you need to pay attention to, but rather, the "target" part.
That means any card effect that does not target is not blocked.
I'm kinda getting Castlevania vibes from this guy. Particularly, mixing one of Dracula's final forms from Circle of the moon (the one where he's an eyeball surrounded by bats) with a Will-O-Wisp from Symphony of the Night. I dunno. Maybe I'm just too big of a Castlevania nerd.