Understand Magic Capability

You read a target creature within range like a book, requiring it to make a Wisdom Saving Throw. If it fails, you know what spells it is currently able to cast, which spell slots or daily spell uses it has remaining, any spells they are currently concentrating on, and the name of each spell it casts as it begins to cast it.

For every 2 Spell Slots above 1st used to cast this spell increases the number of targets for this spell by 1. Each target must make the save.