The Citadel of Azkanath

If The Citadel of Azkanath would be put into your graveyard from anywhere, shuffle your graveyard into your library and draw a card.
{t}, Exile a card from your graveyard: Add one mana of any color to your mana pool.
{w}{u}{b}{r}{g},{t}: Scry 1, draw a card and prevent the next 5 damage that would be dealt to you this turn. Each opponent loses 2 life.