Spell Resistance, Multiple Targets in an Area of Effect

[LFDPrivateer]

Scenario:
Witch Casts Prayer
Prayer has an AoE of 30ft
There are four enemies with SR in that AoE
Does the witch have to roll to defeat the SR for each creature (like a saving throw)?
Or is it a single roll?

[dragonhunterq]

spell resistance wrote:

To affect a creature that has spell resistance, a spellcaster must make a caster level check (1d20 + caster level) at least equal to the creature's spell resistance. The defender's spell resistance is like an Armor Class against magical attacks. If the caster fails the check, the spell doesn't affect the creature. The possessor does not have to do anything special to use spell resistance. The creature need not even be aware of the threat for its spell resistance to operate.

You make a caster level check for each creature in that AoE.

[Nefreet]

^ that.

[LFDPrivateer]

Thank you!
Seemed ambiguous, seeing as how it was a caster level based check, and the spell was cast once.

[Gilarius]

To speed things up, some GMs prefer to roll once per spell instead. The rule can be interpreted that way, so it isn't even a house rule.

Ask your GM.