The Serpents of flame power is a daily with a standard attack and an opportunity action (both daily)
The sustain for the effect (required for either action) is either a minor or a standard (the one I'm worried about). The standard is worded like this:
"The effect persists until the end of your next turn and you can repeat this power's attacks."
What I'm wondering is, do you have to sustain it (standard) and then wait for the next turn to attack (standard), or can you attack with the same action you use to sustain it.