But the average Red Dragon has 256 hit points, and there aren’t even any weapons that do a d20’s worth of damage. At most that’s a critical hit, which would double the dmg die’s roll, in this case being 1d6 dmg, giving a muximum possible dmg of 12. At most you could do 24 dmg in one turn, assuming you are playing as a fighter and get the extra action in your turn, and you roll another nat 20 to hit.
If you homebrew/improvise a weapon, it can have a d20 damage die. I once as a joke had my barbarian pull out an anvil and start beating the bbeg to death with it.
24
I just realized that’s #3
But the average Red Dragon has 256 hit points, and there aren’t even any weapons that do a d20’s worth of damage. At most that’s a critical hit, which would double the dmg die’s roll, in this case being 1d6 dmg, giving a muximum possible dmg of 12. At most you could do 24 dmg in one turn, assuming you are playing as a fighter and get the extra action in your turn, and you roll another nat 20 to hit.
But then it wouldn’t be funny.
If you homebrew/improvise a weapon, it can have a d20 damage die. I once as a joke had my barbarian pull out an anvil and start beating the bbeg to death with it.