Here are a few ideas:
- A spell that provides some protection from damage to the target friendly unit for the following turn. (Not sure how you are doing damage but this could be extra armor, ignore X number of hits, harder to wound, etc.)
- A spell that allows a friendly unit to automatically pass it's next Command Check.
- A confusion spell that forces a target enemy unit to pass a Command Check or attack the nearest "friendly" unit. Alternately, this confusion spell could cause the target unit to lose it's turn if it fails the Command Check as it remains in place and argues on what to do. (Although that's a bit similar to your #3 spell.)
- A spell that allows a friendly unit extra attacks for the next turn. Alternately to balance the extra attacks, the friendly unit could be forced to pass a command check at the end of the spell or suffer X number of hits from exhaustion.
Depending on the age of your kids and how "goofy" you want to go, there are ideas from other games like a giant foot that comes down from the sky and squishes enemy units or summoned swarms of squirrels or rabbits that attack and do X hits to units.