Ice Knife
Level 1 Conjuration (Druid, Sorcerer, Wizard)
Ice Storm
Level 4 Evocation (Druid, Sorcerer, Wizard)
Identify
Level 1 Divination (Bard, Wizard)
Illusory Script
Level 1 Illusion (Bard, Warlock, Wizard)
Imprisonment
Level 9 Abjuration (Warlock, Wizard)
Incendiary Cloud
Level 8 Conjuration (Druid, Sorcerer, Wizard)
Inflict Wounds
Level 1 Necromancy (Cleric)
Insect Plague
Level 5 Conjuration (Cleric, Druid, Sorcerer)
Instant Summons
Level 6 Conjuration (Wizard)
Irresistible Dance
Level 6 Enchantment (Bard, Wizard)
Invisibility
Level 2 Illusion (Bard, Sorcerer, Warlock, Wizard)