Spell Summary

Spells come in two main types, tHills of Shadee that are vendor bought for rank 1 and dropped for rank 2, and tHills of Shadee that are dropped for rank 1 and faction vendor for rank 2. For the first type its easy to find your spells, the rank 1s are sold by the same five vendors (one per level) for all classes. The dropped rank 2s are simply world random according to level:

Level 76 - Tier 1 and 2 zones
Level 77 - Tier 1, 2, and 3 zones
Level 78 - All zones
Level 79 - Tier 3 and 4 zones
Level 80 - Crystallos and Mansion only

The rank 3 versions of these spells are acquired from runes which drop from raids, Humming Finsternacht Runes provide the level 76 spells, Whirring Clockwork Runes provide the level 77/78 spells, and Glowing Prismatic Runes provide the level 79/80 spells. The order you receive the spells is based on their internal itemID and is consistant.

For the other set of spells the rank 1 versions drop in specific zones of specific mobs for specific spells. You can find the spells for your class in the following list:

Warrior
Opportunistic Strike - wisps in Hills of Shade
Knuckle Smash - copter models in Steam Factory

Cleric
Vow of Victory - shadowmanes in Loping Plains
Eleventh-Hour - skeletons in Loping Plains
Hallowed Ground - treants in Hills of Shade
Promised Restoration - aviaks in Hills of Shade
Chromaassault - blackwaters in Hills of Shade
Blood of the Devoted - steamworks in Steam Factory
Circle of Divinity - copter models in Steam Factory

Paladin
Trial for Honor - boneguards in Hills of Shade
Burst of Morrow - shades in crypt in Hills of Shade
Aurora of Morrow - troopers in Mansion
Righteous Fury - ????
Sustenance of Tunare - steamworks in Mansion

Ranger
Tome of Jolting Snapkicks - scarecrows in Hills of Shade
Deadfall - goos in Hills of Shade
Arc of Arrows - wereorcs in Bloodmoon Keep
Summer's Viridity - spiders in Bloodmoon Keep
Tome of Aimshot Discipline - steamworks in Mansion (unconfirmed)

Shadowknight
Soulthirst Horror - alligators in Loping Plains
Assiduous Impurity - goos in Hills of Shade
Trial for Power - shades in crypt in Hills of Shade
Tome of Last Gasp - gnomes in Steam Factory
Umbral Skin - minos in Steam Factory

Druid
Fernspike - minos in Loping Plains
Solarsilver - blackwaters in Hills of Shade
Survival of the Fittest - bushes in Hills of Shade
Winter's Blaze - elementals in Hills of Shade
Scales of the Reptile - ghosts in Bloodmoon Keep
Nature's Burning Wrath - ????
Preincarnation - minos in S.H.I.P.

Monk
Wheel of Fists - steamworks in The Mechamatic Guardian
Delay Death - steamworks in Gyrospire Beza

Bard
Psalm of Potency - wisps in Hills of Shade
Polyphony of Pain - crows in Hills of Shade
Arcane Anthem - goos in Mansion
Aura of the Artist - brownies in Steam Factory
Kaerra's Spirited Crescendo - skeletons in Mansion

Rogue
Fadelure - brownies in Steam Factory
Switfblade - steamsuits in Steam Factory

Shaman
Talisman of the Puma - orcs in Loping Plains
Languor - kirathus in Hills of Shade
Rolist's Drowse - ghouls in Hills of Shade
Ancestral Intervention - kirathus in Hills of Shade
Bite of the Brownie - ghouls in Hills of Shade
Ward of Resurgence - steamworks in Steam Factory
Preincarnation - minos in S.H.I.P.

Necro
Phantasmal Orb - horses in Loping Plains
Bonestitch Charm - mulches (by shrooms) in Hills of Shade
Putrefaction - shrooms in Hills of Shade
Pyre of the Lifeless - ghosts in Bloodmoon Keep
Reaver's Pyre - scarecerows in Hills of Shade
Splort - gnomes in Mansion
Venonscale Venom - steamworks in Gyrospire Zeka

Wizard
Wildmagic Burst - vampires in Loping Plains
Funnel of Frost - treants in Hills of Shade
Rime Snap - bushes in Hills of Shade
Chaos Conflagration - steamworks in Mansion
Ethereal Rime - minos in Mansion
Flashflames - gnomes in Mansion
Tangleweave Energy - ????

Mage
Shock of Many - dangol goblins in Loping Plains
Burning Brimbody - steamsuits in The Mechamatic Guardian
Mass Prime Transvergence - steamworks in S.H.I.P.
Rancorous Servant - gnomes in Gyrospire Beza

Enchanter
Mystifier's Aura - ghosts in Loping Plains
Runic Swirl Aura - nightwalker goblins in Loping Plains
Mana Resurgence - shrooms in Hills of Shade
Wake of Atrophy - boneguards in Hills of Shade
Aura of Endless Glamour - spiders in Bloodmoon Keep
Aura of Horror - wereorcs in Bloodmoon Keep
Mana Resurgence Aura - brownies in S.H.I.P.

Beastlord
Bite of the Borrower - aviaks in Hills of Shade
Promised Recovery - bushes in Hills of Shade
Growl of the Puma - crows in Hills of Shade
Howl at the Moon - steamsuits in Steam Factory
Tome of Harrow - gnomes in Steam Factory

Berzerker
Decimator's Volley - elementals in Hills of Shade
Battle Frenzy - minotaurs in Steam Factory

The rank 2 of these spells are found on various faction merchants, you can check the 7 factions to see who has the spell you are looking for. For the rank 3 you need to unlock them either by a set of quests or a specific raid kill. You can find details for unlocking rank 3s on the faction pages as well.