San'layn Ritualist

Whenever you gain life, untap San'layn Ritualist.
{r}, {t}, Pay 2 life: Create two Blood tokens.
{b}{b}, {t}, Pay 2 life: Create two 1/1 black Bat
creature tokens with flying and lifelink.
{b}{b}{r}, {t}, Sacrifice San'layn Ritualist: For each
opponent, create a Blood Plague token attached
to that player.