Translation:The priest and the bard can sacrifice.
I also thought that, and so I looked it up. "Vates" is the same in both the singular and plural. https://www.online-latin-dictionary.com/latin-dictionary-flexion.php?parola=vates
Sorry, let me rephrase this. Well, I see now that the singular is also correct. Nonetheless, I did check a dictionary before posting this: https://www.online-latin-dictionary.com/latin-english-dictionary.php?lemma=VATIS100