Silent Flight Matriarch

Deathtouch, lifelink
When Silent Flight Matriarch enters the battlefield, create X 1/1 white Bird creature
tokens with flying, where X is the amount of life
you have gained this turn.
At the beginning of your upkeep, sacrifice
another creature. If you do, you gain 1 life, and
each opponent loses life equal to that creature's
power unless they sacrifice a creature.