None of those three were anything but Unholy Magic, but the witches could activate the first two easily enough. However, none of them knew the third one that the mages of the Fallen Army used to provide their mana to their leadership group, who would cast the more advanced spells that the others didn't have the skills or focus for.
When they were engaged in combat, it was easier to provide mana to the Command Group, who cast all the spells, than it was for everyone to cast while fighting.
The professor drew the barrier spell on the board, while Wolfe worked to enhance Lula's mana pathways enough that she could actually use magic smoothly.
She already had some decent potential, though no training, and she had only just grasped the method of gathering mana for magic this morning.