Simple RAW for 5e 4: Smackdown v. RAW

[Erys]

'Only the first round (when you cast the spell) is covered by RAW'
No, it isn't. There is no mention of it affecting only for the first round, or subsequent rounds. My issue with your answer stems from your insistence that it specifically affects the first round, but then is non specific: this is untrue, it is non specific completely.

If YOU wish to debate this create a new thread.

RAW says "when you cast the spell" so absolutely the first round when you cast the spell is covered by the Rules As Written.

There are no Written Rules past "when you cast the spell" though... so anything past that is up the DM.

This is actually very straight forward... what is your disconnect here?