Zurath, the Cycle Master

Zurath, the Cycle Master cost {1} less to cast for
each card you discarded this turn.
Whenever you discard a card, if it was a:
• Instant or Sorcery card, draw a card.
• Creature card, create a 2/2 black Zombie
creature token.
• Land card, add {c}{c} to your mana pool.
Otherwise Zurath, the Cycle Master deals 2
damage to target creature or planeswalker.