You could always describe in the emote how serious the magic is if it hits.
"Red X throws a fireball out his arm in an arc at his enemy, if it hit the target would suffer mild to superficial burns that spanned across a small area"
"Red X throws a fireball out his arm in an arc at his enemy, if it hit the target would suffer mild to superficial burns that spanned across a small area"
Kevin Gates - Told Me