Alcohol

The duke didn't say anything at first as he looked at the area that Veronica was pointing at.

But then he said, "Even if we do trap them there, the wind will blow out any fire that we set. It's called Wind Valley for a reason."

Veronica didn't seem discouraged when she heard this. She just simply gave a nod of affirmation before saying, "That's right, the wind will blow out the fire."

After she said this, everyone couldn't help looking at her with a confused look.

Why did she sound so positive when saying this?

This was confirming that her plan wouldn't work since the fire wouldn't last to burn away the undead.

But then Veronica said, "But what if we used something to keep the fire going?"

At this, everyone revealed even more confused looks.

This seemed possible if they used something to keep the fire going, but where would they get that much of that thing?