When reading a power (for example Dragon Claws pg. 218), how do you calculate when the power is heightened? Dragon Claws states:
"Heightened (3rd) The claws count as +1 magic, granting a +1 item
bonus to attack rolls and adding a damage die; you gain 7 resistance."
Does this mean the power is heightened when the caster reaches character level 3 OR when the caster is able to cast 3rd level spells? Thanks in advance @o@