Grave Robber

Skulk
Whenever Grave Robber deals combat damage to a player, you may exile a card from that player's graveyard, if you do, draw cards equal to half that card's mana value, rounded up.

When the necromancer came to the graveyard, he was surprised to find that the graves were already open.
The deceased all seem to have been very poor, since in their graves was not a single valuable item; some appeared to even have been buried naked.