Dina, Soul Steeper

Whenever you gain life, each opponent loses 1 life.
{1}, Sacrifice another creature: Dina, Soul Steeper
gets +X/+0 until end of turn, where X is the
sacrificed creature's power.
Oh, is that a scroll? Takes me back to my academy
days. Very well. This is sorcery with which I'm not
entirely unfamiliar. I'll be sure to incorporate it into
one of your lessons. Never lose that inquisitive
spirit, my apprentice.