Banishment

Banishment
Magic Resistance: Yes
Advanced Eldritch Spell [Magical, Perceptive]
Prerequisites: Eldritch Rank 6
Disciplines: Abjuration
Potency: [1d8 + Eldritch Rank]
Cast Action [CT 3, REC 2]
Components: V, S
Cost: 3 Resolve
Range: 50 ft.
Effect: Weaving the magical forces of your plane to do your bidding, you force a Summoned or Extraplanar creature to return to its home plane. If the target is a Summoned Creature, make an Opposed Potency Check against the power that summoned the creature. If you succeed the check, the creature is unsummoned.

If the target is an Extraplanar creature (and not one that was Summoned), make the following attack:

Target: One Extraplanar creature within range.
Attack: Arcana vs. Will
Hit: If the target does not make a Saving Throw [5d10 vs WIS] within 20 segments, it is Banished.
Master Augment, Exodus
[Eldritch Rank 8, Stacking]
Stacking [Rank 8, 9, 10, etc]: This augment may be applied multiple times and is limited by your Eldritch Rank.
Cost: 2 Resolve
Effect: You may affect an additional target with this spell.
Master Augment, Expulsion
[Eldritch Rank 8]
Cost: 1 Resolve
Effect: Increase the Saving Throw by 1d10 [STP 1d10].
Master Augment, Sudden Departure
[Eldritch Rank 9]
Effect: Decrease the amount of time the creature has to save by 10 segments.