Graveyard litch

As long as this card is in your graveyard,
Whenever one or more land cards are milled into your graveyard: add one color.
Whenever one or more creatures are mulled into your graveyard: create a 2/2 black zombie creature token.
Whenever a one or more non-creature, non - land cards are milled into you graveyard: deal 2 damage to any target, you gain 2 life for each damage dealt this way.
Whenever two or more cars types are milled into your graveyard: exile this card.
Whenever two or more card types a