[3.5] Area Dispel Magic vs Multiple Spells of same caster level ??

[Chronikoce]

How does area dispel magic work when its area includes a character with a large number of buffs (6 active spells) all with the same caster level?

How do you determine which spell is affected first?

[Venger]

you do so randomly. the simplest way is for the gm to assign each one to a number on a die and for you to roll