@JeremyECrawford
In an area of bright light, can a Shadow Monk use his/her Shadow Step to teleport into a creature's shadow?

— Gustavo Ryu Shimada (@ShimadaRyu) September 20, 2017

Shadow Step says you must be in dim light or darkness to use it. If you're in bright light, it doesn't work. #DnD https://t.co/TfoELaARWc

— Jeremy Crawford (@JeremyECrawford) September 20, 2017

So, in other words, be a halfling standing in a (presumably friendly) creature's shadow, and you're golden?

— You (@Kastomere) September 20, 2017

Shadow Step doesn't care who or what is producing the required dim light or darkness. If you're in such lighting conditions, it works. #DnD https://t.co/KX9JXWCAVx

— Jeremy Crawford (@JeremyECrawford) September 20, 2017

Wait, a creature's shadow actually works!? Amazing.

— Nathaniel Kreiman (@NKreim) September 20, 2017

Another creature's shadow plunges you into dim light only if the shadow is big enough to keep you out of bright light. DM's call. #DnD https://t.co/AJqaPKG4qH

— Jeremy Crawford (@JeremyECrawford) September 20, 2017