Imperatrix Regina de Fortuna

Lifelink, Vigilance.
Everytime you gain life, put a counter on Imperatrix Regina de Fortuna.
{w}, sacrifice X counters, {t}: create X white 1/1 vampire tokens with lifelink.
{b}, sacrifice X counters, loose 2 life, {t}: create X black 1/2 vampire tokens with flying.