[Starbelly Geek]

Make it a level 10 or 12 spell, and tie it to a site (bandit lair, maybe, Enter to cast X) and let it remote summon an Ambush. A tough leader and a stack of melee and archer bandits. Or vine ogres and vinemen with a druid leader, summoned from a circle site. Or phantom soldiers and wolves with an air mage leader summoned from an air site. If the units go away after one combat, it could even be relatively balanced if they're summoned to a friendly province, especially if the leader and/or toughest troops were unique.