Arturo, Linchpin Dealer

When Arturo enters the battlefield, create two 1/1 black and blue Rogue creature tokens.
{1}{b}{u}, Tap an untapped Rogue you control: Search your library for an Assassin or Rogue card, reveal it, and put it into your hand. Shuffle your library.
{1}{u}, Sacrifice another Rogue or Assassin: Arturo gains hexproof until end of turn.