Here is the full list of all 34 Sorcery trophies - there are 18 bronze, 11 silver, 4 gold and 1 platinum.
Collect all the other trophies in the game
Beat the game without drinking a single health potion
Hit an enemy with arcane, ice, wind, fire, and lightning
Accumulate 20,000 gold
Open every chest in the game
Collect every treasure in the game
Kill 4 sylphs with one lightning bolt
Set 7 enemies on fire at the same time
Kill a fire sylph and an ice sylph with a lightning storm
150 kills with ice
Shatter 3 enemies with one hit
Kill the Nightmare Queen
Killed by Erline
Repair the sky
Kill the Forest Guardian
Kill an enemy with a double ricochet
Research every potion in the game
Find every ingredient in the game
Cast lightning trap, lightning storm, and lightning bolt simultaneously
150 kills with fire
Freeze yourself with a reflected ice bolt
Pick up 5 spiders with a whirlwind
Kill the Elf Assassin
Open 50% of the chests in the game
Execute the fire/wind/arcane combo
Die while you're a rat
Keep an enemy chilled for 20 seconds
Kill the Troll in Ordale
Kill an enemy with shield bash
Change every sheep at the tower into a pig
Kill the Banshee
Take damage from a reflected arcane bolt
Kill an enemy that you can't see with curved bolt
Hit an enemy simultaneously with a curved bolt and a straight bolt