Suppose that my party uses Dimension Door to get into the enemy temple. Their spell dumps them into a room containing a cultist who is awake and alert (but not, obviously, expecting imminent combat). What happens next?
I'm choosing between:
- Casting the spell initiates combat with a surprise round; the spellcaster gets no further actions this turn, but the rest of the party gets a standard action for surprise
- The party wasn't aware of the cultist prior to the spell, so it takes them a bit of time to orient themselves; there is no surprise round
Is there a standard way to handle this, or do I just do whatever leads to a more interesting combat?