Ereus, Astral Prophet

Ereus, Astral Prophet has hexproof as long as it
isn't your turn.
Whenever one or more instant or sorcery cards
are put into or leave your graveyard, draw a card.
{u}{b}{r}: Target instant or sorcery card in your graveyard gains flashback equal to its mana cost.
"My creations fill the blind eternities."