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Damn. I thought I had magic circle against evil, which was why I needed so much set-up time. I'll just cast remove curse, remove disease, and dispel magic on Wilbur, closing him off in a semicircle wall of good.
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Dispel magic roll (1d20+8)[16]
Vinto follows Janen and the others out of the house, looking for somewhere flat and well-lighted to begin his checkup. ((If necessary, he'll light a torch)) Motioning Sanfeng, he asks, "Put him down here, and stand back. I shouldn't be long, I hope - I'd love to pitch in my share of burning this foul place down."
Concentrating again, he summons another shimmering forcefield, similar to the one he'd closed the roof inside with, but bowl-shaped, and covering the area around "Wilbur." Cleansing and sterilizing the area, Vinto's first actions directly involving the old man are to once again attempt to purge him of magics, followed by a routine health check-up ((taking 10, for 23)).
"Well, the good news is, he's breathing... for now."