When reading the wording for the Word of Radiance cantrip, it says:
Each creature of your choice that you can see must pass a Constitution save or take 1d6 radiant damage.
Let's say that my cleric is standing in an open area with enemies within 5 feet on all sides. How would I be able to hit enemies behind me at the point of casting? The whole point of the spell is to hit everyone around you, and it is purposefully not a cone, but it seems like there is no way to have line of sight 360 degrees around you.
The only [mainly flavor] explanation is that it works because the character can spin around 360 degrees during the casting time to "see" the targets behind them.
5e lacks official flanking rules, so is there any clarification on the interaction between line of sight and positioning in cases like this?