Power ideas:

• Hellfire (all things immolate, conflagrate, trade bits of your soul for power)
• Teleport (fey step, dimension door, portals, etc)
• Glamour (change appearance, charm and seduce, veil)
• Emotion
• Bardic Music
• Wonder/Chaos (wild magic, random effects)
• Drain (life, mana, soul, abilities, attributes, levels)
• Shadow (useful items, shadow double, shadow armor, shadow wall but not void)
• Bladebound
• Wind
• Fire
• Frost
• Lightning
• Earth
• Water
• Spirit
• Plants
• Telekinesis
• Force Construct (magic missile, floating disk, Scanlan's hands, wall of force)
• Gravity
• Polymorph
• Symbol
• Time (hop, accelerate, stasis)
• Shield (Beryl's power)
• Absorb Magic / Antimagic (needs some thought)
• Sound (shout, shatter, sonic damage)
• Figment
• Divination
• Reanimation (all things necromantic)
• Blood
• Disease
• Curse
• Telepathy (read/plant thoughts, sensation, memory, dominate)
• Death
• Radiance (holy light, searing light, etc)
• Protection (power word shield, spell immunity, sanctuary)
• Divinity (holy aura, consecrate, holy word, turn/rebuke undead)
• Creation (astral construct)
• Felicity
• Arcane Sight / Mystic Eyes / etc (needs some thought)
• Levitation/Flight
• Necrotic (necrotic/negative energy damage, not sure there's enough here)
• Combat Precognition

Not sure:

• The big 4:
  • Thaumaturgy
  • Evocation
  • Arcana
  • Invocation
  • They probably do work but they need more than just a few rituals (Invocation is probably good)

But what about?

• Ironguard (blood?)
• Necrosis (animate dead?)

Explicitly not powers:

• Healing (other powers can heal, but not too much)