Can the Rogue SA twice during the same round, if on two different turns. However, certain classes do have ways to enhance the damage further (Barbarian Rage, Fighter Battle Master dice, Paladin Smite, Rogue Sneak Attack, To clarify. Melee attack damage per hit often requires you to use the weapon with the biggest weapon die. In my attempt to make sense out of rules for hiding, I finally realized that the rules for stealth and for hiding are one in the same. In the new 5th edition Player’s Handbook, the rules for Hiding/Sneaking are a bit unclear. Clarification of Stealth and Hiding Rules. The Sneak Attack restriction is once per turn, not once per round. Both the rulebook states you do not need to declare which attack is the sneak-attack, but can even be easily explained how a second attack (assuming you cross-classed or are using two weapons) still does sneak attack damage. On amazon usually they are under 30 each instead of 50. The books aren't that expensive by the way if you buy them from the right place. Does it double on crit? “In DnD 5e do you have to declare which attack has Sneak Attack when you have multiple attacks per turn?” No, you do not. The 5e DMG is very good, it was a pleasant surprise for me after the disappointment 2e, 3e, and 4e DMGs were. But it also mentions 'Extra damage', like Sneak Attack does.
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If the attack involves extra dice-from a feature like Orcish Fury or Sneak Attack-you roll those an additional time too. When you score a critical hit, you get to roll the attack's damage dice an additional time.