Here is the full list of all 20 Force of Elements achievements.
Reach Mastery Level 20 with Tarkin.
Reach Mastery Level 20 with Mudruk.
Reach Mastery Level 20 with Phasmus.
Reach Mastery Level 20 with Ki.
Reach Mastery Level 20 with Sir Vaskos.
Reach Mastery Level 20 with Sol.
Play 100 games in any mode.
Create 50 Amplifier Gems by matching gems.
Create 500 Power Gems by matching gems.
Deal 12,000 damage to opponents.
Play 10 games in Moves mode.
Win 20 Battles.
Win 5 battles in a row.
Own 1 additional hero skin.
Create 50 Bombs.
Play 10 games in Timed mode.
Purchase a Level 2 Aura.
Play a game with 5 different auras.
Make 100,000 gem matches.
Battle a friend in a direct challenge game.