Astrua, Implacable Superior

Indestructible
As long as your devotion {c} is five or less, Astrua, Implacable Superior isn't a creature.
As long as Astrua is a creature, your life total
can't change.
{c}{c}{c}{c}{c}: Each opponent loses 5 life and you
gain 5 life. Activate this ability only if Astrua isn't
a creature.