Do others like me read the above bit from the playtest as implying that it was the acidic bog that dissolved the vampires (and then lingered around to "guard [the] right flank")? I only mention this, because Morrus (or whoever posted the info on ENWorld's home) seems to think otherwise:Logan’s warlock laid down a Mire of Minauros on one side of the room, dissolving a couple of vampires and creating a nice acidic bog to guard our right flank.
The warlock opened a fight with two things: a "Mire of Minauros" which dissolved a couple of vampires, and an acidic bog. It appears that he did both these things in the first round.
I don't think it appears that way at all--it struck me fairly clearly that the two results were referring to a single Mire of Minauros. Anyone?