Magic Surges.

They are activated at high levels of stress, and emotional turmoil.

Magic surges are waves of intense and powerful energy that courses through the caster's body. It is like a survival trump card. Their eyes will go blank. And will emit a glow due to their enhanced power.

Magic surges have the caster perform what is their initial instinct, and desire.

They will last until the task the caster wants is complete or the caster is in complete safety.

After the surge is used the caster will be completely drained of energy and magic energy due to how much power and stamina is needed for the surge to happen.