Here is the full list of all 17 Magic Thief achievements.
Complete the taverns
Complete the dungeons
Complete the goblin caves
Complete the kings crypts
Complete the void
Complete all levels perfectly
Help the villagers
Solve the merchants' issue
Return things to relatives
Give the eggs to the dragon
Give money to the peasants
Talk to a hermit magician
Open the cell in which the crystal lay after the rings of time
Complete all the classic levels
Use a sensitive powder to scout 20 cells within one level
Activate the mimic with the transfer sphere
Steal a teleporter