Furina, Regina of All Waters

Creatures you control get +1/+0 for every 1 life
you've lost this turn.
Creatures you control get +0/+1 for every 1 life
you've gained this turn.
{2}{w}, {t}: Create a 0/1 blue and white elemental creature token with "At the beginning of your
upkeep, you gain 1 life."
{2}{b}, {t}: Create a 1/1 blue and black elemental creature token with menace. You lose 2 life.