Outfit+tote purse
Blair had driven all the way out to the Fringes, needing a rather secluded place that she could do this and not get in trouble with the law or noise ordinance. She didn't mind the little climb up to the falls and traveled along the river that fed into it so that she could find a nice pile of rocks.
She would pick one up, tossing it up and down in her hand before she tossed it straight up into the air and with a single thought made the rock shatter and explode with an angry popping sound that filled the air. It made her smile with that control as she would toss another up, make it pop and explode, sending rock bits raining down everywhere before she then started to toss them into the forest to practice difficult aiming, she would continue.
Occasionally she would miss the rock and make a hunk of tree explode in a rain of woody splinters, that made her wince as she mentally apologized to the tree before she continued her explosion practice in what she believed an empty area.