Seraph of Shallow Graves

Flying, menace
Whenever Seraph of Shallow Graves becomes the
target of a spell or ability an opponent controls,
that opponent exiles two cards from their hand.
{t}, Exile two cards from your graveyard: Create
two 1/1 black Skeleton creature tokens with
wither. (They deal damage to creatures in the form
of -1/-1 counters.)