Hahto, the Blade

Whenever you cast Hahto, the Blade:
-For each {w} spent, you gain 2 life and create a
1/3 white Spirit creature token with flying.
-For each {b} spent, you lose 2 life and create a
3/1 black Demon creature token with deathtouch.
Sacrifice a Spirit and Demon: Draw two cards,
gain 4 life and deal 4 damage to any target.
Life and death are one thread, the same line viewed
from different sides. - Lao Tzu