Clown/Trial

Clown
Trial requirement	Clown evolved to 5 stars and equipped with a certificate.
Trial reward	3 Clown, 1 Golden Pot, 100k
Pearl Cost	10× Clown 1× Night Knight
Statue Cost	40x Mithril 2x Tethys (Lv.180) 3x Koios (Lv.270) 3x Themis (Lv.420)
Statue Bonus	Attack+4, Power+2 In Sky and Space, Fire +5 Higher Clone Capacity +2

Method 1:

• Search Chest
• Learn Treasure Seeker > Explorer (3*)
• Cast Fireball on each Assassins to kill them (first 3 only)
• Cast Stoneskin
• Attack Assassins 3x
• Cast Fireball on Boss
• Cast Stoneskin
• Attack Assassins 3x
• Cast Fireball on Boss
• Cast Stoneskin
• Attack Assassins 1x
• Use Seal via Madhouse (building)
• Use Ace Joker (inventory)
• Spread Laughing Gas (skill)
• Attack Boss 6x
• Spread Laughing Gas (skill)
• Attack Boss until dead

Method 2:

• Search Chest
• Learn Treasure Seeker > Explorationist > Blacksmith (2*)
• Cast Fireball on each Assassins to kill them (first 3 only)
• Cast Stoneskin
• Cast Bless
• Attack Assassins until Boss timer is 1
• Cast Stoneskin
• Cast Bless
• Attack Assassins until Boss timer is 1
• Cast Stoneskin
• Use Ace Joker (inventory)
• Use Seal via Madhouse (building)
• Spread Laughing Gas (skill)
• Attack Boss 4x
• Cast Fireball 2x
• Spread Laughing Gas (skill)
• Attack Boss until dead

Method 3: (posted by SweetGoat on Reddit)

• Titles: 3 Treasure Seeker, 1 Explorationist, 1 Blacksmith - gives a +defense item and some extra attack.
• Turn number:
• Open Storage Chest.
• 2-4. Cast Fireball spell on the three Assassins.
• Boss timer is at 1, cast Stoneskin.
• Cast Bless.
• 7-9. Attack three Assassins.
• Boss timer is at 1, cast Stoneskin.
• Cast Bless.
• 12-14. Attack three Assassins.
• Boss timer is at 1, Cast Stoneskin.
• Use Ace Joker item.
• Use Master of Crime active ability to spread laughing gas and then also Seal the Madhouse spawner.
• 18-22. Attack Boss four times.
• 23-24. Cast Fireball spell on Boss twice.
• Use Master of Crime active ability.
• 26+ Attack until Boss is dead.