Mist Stalkers

Shadow (This creature can block or be blocked by only creatures with shadow.)
If black was paid to cast Mist Stalkers, it enters the battlefield with two -1/-1 counters on it.
Whenever Mist Stalkers deal combat damage to a player, you may remove a -1/-1 counter from it. If you do, look at that players hand. You may choose a non-land card. That player discards it.