Hu Tao, Guide to Afterlife

First strike, menace
{r}: Pay 1 life: Hu Tao, Guide to Afterlife deals
half of her toughness rounded up to herself and
gets +X/+0, where X is the amount of life you
lost this turn, until the end of this turn. Activate
this ability only once per turn and as a sorcery.
Whenever Hu Tao, Guide to Afterlife destroys a creature, gain 2 life.