Er - the idea was for the battle to continue until Yawanna turns up to save the day ...
And wasn't the Valar's gesture supposed to be futile?
Really, what is this preoccupation with sudden and battle-turning events? It just means that Mogul's going to have to introduce (or reintroduce) yet
more forces of darkness to the field.
Oh well, c'est la vie ... er ... mort.