Daggerfang Duo

Deathtouch on a three-power body means every block or trade tilts your way, and stapling that to a two-card mill on entry tells you exactly which axis this creature was built to serve. The rat is a fair beater in the abstract, but the enter-the-battlefield mill is the load-bearing half: it seeds a graveyard while the deathtouch keeps the ground contested long enough for that graveyard to pay off. The pairing is deliberate. Aggressive decks want the body and treat the mill as garnish; graveyard decks want the mill and treat the deathtouch as insurance against being raced before their engine matters. The "you may" clause is the quiet discipline, but its job is narrower than it looks: milling unknown cards does nothing to your odds of drawing a bomb, so the choice is really about not decking yourself in a grindy game and about declining to feed the yard when your plan wants cards in the library rather than the bin. It is a small, honest piece of black creature design that does two jobs at once without forcing a full commitment to either, and the deathtouch is what renders the modest two toughness almost irrelevant in combat math.