Here is the full list of all 20 Divine Ascent achievements.
Finish the tutorial
Finish 5 puzzles with 3 stars
Finish 10 puzzles with 3 stars
Finish 15 puzzles with 3 stars
Finish 20 puzzles with 3 stars
Finish 25 puzzles with 3 stars
Finish 30 puzzles with 3 stars
Finish the final trial
Discover their powers
Win a solo arena
Finish a multiplayer arena
Win an arena against 5 AI's
Play a custom arena
Win an arena using only the tactical map
Be the only one to build temples
Win with 3 adjascent temples
Climb 5 levels in one move
Have every squares at a level 5 hight except one
Play 10 arenas
Play 50 arenas