*The Cleric may not cast Bless Water on the mist to help expedite consecrating an area.

*Nor may he cast Bless Water just to make the mist Holy Water and get the terrain advantage of doing such.

*Especially in any game making heavy use of Undead or anything else harmed by Holy Water.

*Doing so in Raven Loft is Right out.

(Actually happened a couple of weeks ago at my in person table. DM literally dinged his head face down on the table, at which point we decided to use different and more manageable tactics to cut him a break instead of breaking the game.

He is a fairly new DM, and I don't think he really appreciates the power a T1 character can bring to bare, but he is learning very fast. )