Lana's eyes go a little wide as she clutches at the meteor rock, because she knows what this means. She knew from back when the two aliens came out of the black ship, that this rock can hurt them. And that means that whoever this Zod guy is, he's one of them, monsters that fill her heart with fear.

Zod barely flinches at the spell, not recognizing what it is. His resistances and weaknesses are off, different from Clark, affected but not as severely. The human part of his host body at work, perhaps. "You stand in the presence of the destroyer of worlds. Kneel before Zod."