Necroking

Unlock the healers

Assemble 10 of your units on the battlefield at the same time

Unlock the cloning mushroom

Create some new cards with the obelisk

Win a battle with no more than 3 cards in your deck

Get a full hand of cards

Get mana completely charged

Win the battle using only spider cards

Restore 20 power in one run by healers

Unlock all allied units from the main biomes in the bestiary

Keep one fish on the battlefield for 5 turns

Complete one run with Necroking taking no damage

Defeat the King when Necroking has 5 power or less remaining

Collect 4 Coffins in the fourth area

Use pumpkin 10 times

Kill your unit with a red candy

Losing a huge amount of treasure in a hellish casino

Spend twice more turns on the battle than there were waves

Defeat any boss in 2 turns or less

Defeat any boss in 6 turns or less

Restore Necroking's powers by using a sacrificial sheep

Put 4 blockers in the same area

Kill 3 your units with berserk in one battle

Unlock the berserkers

Make 10 enemy plants grow during the battle

Triumph over the swamp monster

In the same fight, kill the harpy and win.

Imprison nightmares in an artifact and become their guardian in a deep crypt

Defeat the King a fourth time

Defeat the King a second time

Defeat the King of Men

Defeat the three supreme sorcerers

Defeat the King's final form without ancient tricks

Defeat the impostor spider-queen

Defeat the King's final form

To defeat Raphael in a duel

Defeat all region bosses and then win against the final form of the King using a powerful artifact

Defeat the King a third time