Here is the full list of all 9 King's Hand achievements.
Dethrone your first enemy.
Collect every single card.
Win in less than 30s.
Win with less than 10s remaining.
Trap a piece.
Earn 100 leaderboard points.
Win without using a card.
Win / Lose without eliminating a single piece except the king.
Have a king in danger without the enemy noticing for 3 moves.