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