text: If an Aura becomes attached to a noncreature permanent you control that causes it to become a creature, Siona's last ability triggers. If an Aura becomes attached to a creature you don't control that causes it to become a creature you do control, Siona's last ability triggers. If an Aura becomes attached to a creature you control that causes it to no longer be a creature or to no longer be under your control, Siona's last ability doesn't trigger.