Cardinal Zeves glared at Arthur, angry and enraged that he's comrades died like that. His hate toward this evil person grew stronger by the second.
As for Arthur, he couldn't care less about what he did. He faced the old man and held the dark blade in his hand. He wasn't going to waste time trying new skills or whatever as it clearly wasn't the time for it.
He could feel the chilliness coming where Lucy was which means she used Silent Moon. It's far likely that her fight was over which means he should finish his too.
'Ahh it's been such a long time since I used a sword skill.'
He grabbed the blade's hilt with his two friends and slowly raised it. Zeves wasn't standing there and watching the opponent prepare his attack, he retrieved a short silver scepter and started mumbling again. He didn't summon the white being as it was easily killed by Arthur, who only needed one swing to finish it.