Blood Tithe

Whenever a player draws a card, they may pay
{1}. If they don't, you get a poison counter.
Whenever you lose life, if you had poison
counters, remove that many poison counters
instead.
{p/w}{p/w}{p/w}{p/r}{p/b}, Sacrifice a Phyrexian or Praetor:
You lose 5 poison counters.