Oxi, One Who Lived Long

Whenever you cast a creature, you may pay
{w}{r}, if you do, it gains haste until end of turn.
Whenever you cast a card with deathtouch or
haste, you may pay {b}{r}, if you do, target player
loses 3 life and you gain 2 life.
Whenever you cast a card with afterlife, you
may pay {w}{b}, if you do, increase that afterlife
by 1.