Can you cast Glitterdust 4 times to cover a room? Can you have 7 create pits going all at once?
Can you cast Glitterdust 4 times to cover a room?
If you are able to cast it four times, and the room is not bigger than 40x40 (or similar area), sure.
Can you have 7 create pits going all at once?
If you are able to cast it 7 times, and you have a high enough caster level that the first one doesn't expire before the last one gets cast.
If the duration of a spell is Concentration, you need to spend a standard action concentrating to keep it going. Otherwise, the durations just happen.
Can you cast Glitterdust 4 times to cover a room?If you are able to cast it four times, and the room is not bigger than 40x40 (or similar area), sure.
Can you have 7 create pits going all at once?If you are able to cast it 7 times, and you have a high enough caster level that the first one doesn't expire before the last one gets cast.
If the duration of a spell is Concentration, you need to spend a standard action concentrating to keep it going. Otherwise, the durations just happen.
Really? For some reason I always thought casting a spell a 2nd time ends the first casting.
There are some individual spells that function that way, but that's because that's how those spells work, not how spells in general work.
There are a few that turn off or have a limiter in someway (see Awakening, or the HD you can control with animate undead).
Mostly, multiple castings of the spells overlap, and don't stack. So it really doesn't become an issue unless:
a) one spell provides a bigger bonus (+2 enhancement to str, versus one with +4 enhancement)
b) durations (multiple casting don't tack on time, you just stay under the effect of the longest one)
c) one spell gets dispelled. (you get glitter dusted twice, you dispel one, the other is still effecting you).