Ristall, Aspect of Conviction

{1}{w}{w}, {t}: Target player gains 5 life.
{1}{b}{b}, {t}: Target player loses 5 life.
{3}{w}{w}{w}, {t}, sacrifice an Avatar: Double target
player's life total.
{3}{b}{b}{b}, {t}, sacrifice an Avatar: Target player
loses half their life total, rounded down.