I had the magic spell and mana requirements for the heal spell (which when I have a team mate is offered as emergency response) I'm still curious why the titles do the exact same between them.
So both arrow and boulder traps have two types of damage. If there is a magical element to it (like a fire boulder), the trap damage is calculated twice: once as a boulder and once as a magical trap. The physical title halves the physical damage, while the magical title halves the magical damage.