FrogReaver
The most respectful and polite poster ever
That would depend on what enter actually means in this context.Because the creature didn’t enter the spell’s area. The caster created the spell’s area in a space where the creature already was.
Let's try an example. Sign at Beach says do not enter water. You sit at the edge of the water. The tide comes in and engulfs you. Most people would conclude you entered the water even though you never moved from your position.
That is, at least some uses of "enter" don't necessarily require action on your part.
Sure. There might be a good argument that the other interpretation is obviously imbalanced and thus cannot be the correct one in light of a viable alternative. I'm not sure that's the case though as flaming sphere can do it's damage twice per round as well (unless it was errated at some point). Once when you bonus action attack with it and the next if the creature doesn't move (might be more afraid of the OA's than the sphere).Running it where casting the spell counts as the creature entering the space also causes the spell to do double its normal damage per round on the turn you cast it. Under RAI, the spell can only damage any given creature up to once on that creature’s turn - either when the creature moves into the space, or when the creature starts its turn already in the space. Under the other interpretation, you cast it over a creature’s space, that creature immediately takes damage, and it takes damage again at the start of its turn. That creature has now been damaged by the spell twice since its last turn. Twice as many times as it’s supposed to have done.