@matthewmercer & @JeremyECrawford Yasha had a savage critical last session. When she did you only rolled a single d6. Wouldn't the "additional damage die" be the weapons damage die, 2d6, for the greatsword? If it were a greataxe it'd be a d12, correct?

— Eli McWho (@EliMcWho) February 18, 2020

The player rolls an additional “die”, not “dice”. That’s the benefit of, per say, the Great Axe vs a Great Sword.https://t.co/shKp6xKwnF

— Matthew Mercer (@matthewmercer) February 18, 2020

When you’re instructed to roll a die in D&D, you’re being asked to roll one die, not more than one dice. The distinction between "dice" and "die" is slowly vanishing in some English-speaking areas, so I do have sympathy for confusion about "die" vs. "dice." The Oxford dictionary I just consulted even admits that "one dice" is becoming legit.

Language—it's ever evolving!

— Jeremy Crawford (@JeremyECrawford) February 19, 2020