Right 2 more to go, here's fire magic:
Fire Tier 1:
Burning hands - 10 mana tactical (2 turns cooldown) - does 8 fire damage (+4 per fire shard) to an adjacent enemy - damage halved if resisted
Candlecloak - 30 mana tactical (also requires fleshbound tome) - all friendly units gain a flamecloak and enemies attacking them take 3 fire damage from the cloak
Protection from fire - 30 mana tactical (also requires book of flames) - all friendly units gain 50% fire resist
Fire Tier 2:
Burning blade - 10 mana champion enchantment - champ/sov gains fire attack bonus (+2 fire damage and +2 per fire shard)
Flame dart - 24 mana tactical - target enemy takes fire damage which is double casters level +4 per fire shard - damage halved if resisted
Pillar of fire - 48 mana strategic - target enemy army in controlled territory takes 8 fire damage (+4 per fire shard) to each unit
Fire Tier 3:
Feedback - 24 mana tactical - disrupts enemy spell and deals 6 fire damage (+6 per fire shard) to enemy caster unless they resist
Fireball - 50 mana tactical (1 turn casting time) - deals 18 fire damage (+6 per fire shard) to all units in 3x3 square - damage halved if resisted
Focus - 4 mana tactical - damage doubled for caster's next action
Fire Tier 4:
Mantle of fire - 25 mana unit enchantment - unit is protected by a flamecloak that deals 6 fire damage to anyone that attacks them
Summon fire elemental - 30 mana summon (tactical and strategic) - summons a level 5 (+1 per fire shard) fire elemental
Fire Tier 5:
Firestorm - 200 mana strategic - target army takes 10 fire damage (+10 per fire shard) to each unit - leaves a firestorm hazard on the tile for 10 turns
Wall of fire - 20 mana city enchantment - protects city with a fire wall - enemy units that attack city take 10 fire damage (+5 per fire shard) each
(EDIT) Heart of fire - 200 mana city enchantment - trained units gain +1 fire attack per essence and per fire shard
Combo spells:
Glyph of life - 30 mana city enchantment (Life2Fire2) - all defenders gain regeneration
Soulburning - 32 mana tactical (1 turn casting time) (Death2Fire2) - damages enemy - 12 damage plus 6 per fire/death shard - leaves a fire hazard on tile
Sunder - 15 mana tactical (Air2Fire2) - enemy elemental takes 5 damage per caster's level
Cloak of thorns - 30 mana enchantment - 25% damage is reflected from target to caster
So, thoughts on fire magic?