Starrlk, Proficient Pilferer

Skulk (This creature can't be blocked by creatures with greater power.)
Whenever Starrlk, Proficient Pilferer deals combat damage to a player, you may draw a card. If you do, discard a card. Then put a +1/+1 counter on Starrlk.
{r}{r}: Starrlk gains double strike until end of turn.