Under some circumstances, if you throw a D8 and then a D12 at an enemy, thanks to the D8's greater pointiness you actually have to roll a D12 and D8 respectively to determine damage.
https://xkcd.com/3028/
D&D Roll

xkcd
@xkcd @lx apparently you have a bug related to ampersands in comic titles
@aburka Thanks for the heads up, I’ll have a look!
@aburka I just checked the RSS feed and technically speaking, the bot is right 😃 I am not sure, if Randall changed the title but the feed is stuck on the old value or if he did it on purpose, but the bot did everything correct this time around 😉