Here is the full list of all 10 The Wizard's Lair achievements.
Die in under 10 turns.
Deal over 100 damage to an enemy.
Kill a Magesteel Jelly.
Defeat the Wizard.
Become Warmaster. Great work!
Obtain the holy sword Excalibur.
Get the Warmaster Sword.
Get the Warmaster Armour.
Punch an enemy to death.
Die to the Wizard.