All right. Here's my take. I tried to take spells from the old domains and mix them with a couatl / rainbow flavor. Of course, I also borrowed from Nifft's interesting proposals.
[h1]Rainbow Servant[/h1]
Prerequisite: Any arcane class
Sense Evil (11th level): You gain a +2 bonus to Insight. If you are surprised, you can still take a single move or minor action during the surprise round.
Rainbow Action (11th level): When you spend an action point to take an extra action, one ally who can see you can loose a healing surge to gain temporary hit points equal to his or her healing surge value plus your Int or Cha modifier.
Rainbow Wings (16th level): You gain Overland Flight 12.
Gust of Wind • Rainbow Servant Attack 11
Encounter • Arcane, Implement, Thunder
Standard • Area burst 1 within 10 squares
Target: Enemies within burst
Attack: Int or Cha vs. Reflex
Hit: 3d6 + (Int or Cha) thunder damage and you slide the target 1 square and knock it prone.
Effect: You slide all allies in burst 1 square.
Couatl's Circle of Protection • Rainbow Servant Utility 12
Daily • Arcane, Zone
Standard • Close burst 5
Effect: You push all enemies in burst 5 squres. The burst also becomes a zone that remains centered on you and lasts until the end of your next turn. The zone is difficult terrain for your enemies.
Sustain Minor: The zone persists.
Rainbow Bolts • Rainbow Servant Attack 20
Daily • Arcane, Healing, Implement, Lightning, Radiant
Standard • Close burst 10
Targets: Up to three creatures in burst
Attack: Int or Cha vs. Reflex
Hit: 4d6 + (Int or Cha) lightning and radiant
Effect: You and each ally in burst can make a saving throw and spend a healing surge.
