You can tap any other untapped Rogue you control, including one you haven't controlled continuously since the beginning of your most recent turn, to pay the cost of Shadow Stinger's first ability.
Tap another untapped Rogue you control: This creature gains deathtouch until end of turn.
Whenever this creature deals combat damage to a player, that player mills three cards. (They put the top three cards of their library into their graveyard.)
