Are you able to dispel it as much as summon it? I only ask because we've spent a long time in cool and cold climates and it makes it hard to grow everything we'd like. For the moment, it looks like Tu Vishan is heading to warmer regions, but it would be enormously valuable to hold off cold snaps in the future, even just for a little while.

[Long enough to get covers over certain crops, and to harvest others, for example.]

We could make a more formal arrangement, if it's within your abilities. I wouldn't want to stretch you thin.