Shadow school, should be a resemblance of your school back in Ravenwood, where you have to lvl up/ complete certain quests to receive a Shadow Enhance Training point...and get a new spell going down the list, and can't get a spell with out getting every spell following prior. and it's set to be the spells from your wizard's school, so a ice wizard will see Shadow Frost Beetle, and a storm, Shadow Thunder Snake.
every spell has gain a great improvement of damage(400-500+), and now require a shadow pips.. of course its not entirely like your previous school
list of spells you need to train, in order
1 pip spell 2 pip spell Shadow Blade, Trap, Shield 3 pip spell Shadow Pixie 600 heal to any target 4 pip spell Shadow Global +20 damage +40 Shadow pip chance 5 pip spell Shadow Spear/ Absorb(1000 absorb to the next shadow spell, regular goes through it) 6 pip spell
all the # Pip spells, are hits, so like Satyr, sprite, Spirit armor, wont be in it.. and Treant, Triton, Frostbite etc. will fill the gaps