@JeremyECrawford Does Dawn cylinder go through walls and floors? Asking for a friend.

Also, your game IS my life. #dungeonsanddragons #DnD #dnd5e@SageAdviceDnD pic.twitter.com/hbfC50h9Tl

— DM Life (@stherdman) January 14, 2020

The area of effect of a spell, such as the dawn spell, doesn't extend through total cover, like a wall or floor, unless the spell's description says otherwise.

For more on how areas of effect work, take a look at "Areas of Effect" in the PLAYER'S HANDBOOK (p. 204). #DnD https://t.co/KUpypaWAAW

— Jeremy Crawford (@JeremyECrawford) January 14, 2020

Thank you! Not the answer Than (me!) was hoping for, but it makes sense. You're welcome! 😀

— Jeremy Crawford (@JeremyECrawford) January 14, 2020