Grey Stinger

When Grey Stinger comes into play, or at the beginning of your turn, if you control less than two Spiderling tokens, put Spiderling tokens into play until you control two. Spiderlings are 1/1 black tokens with Deathtouch.
{1}{b}, Sacrifice every Spiderling token you control: Put a -1/-1 counter on up to X target creatures, where X is the amount of Spiderlings you sacrificed this turn.