Veilar, Herald of Infection

Delve (Each card you exile from your graveyard
while casting this spell pays for {1}.)

Deathtouch, Menace, Ward: Sacrifice a creature.

Whenever Veilar attacks, each player of your choice
mills a card, loses 1 life, and discards a card.

Once each turn, you may play a card from a
graveyard, and you may spend mana as though it
were mana of any color to cast it.