The Witch and the Hundred Knight: Revival Edition

(Tower of Illusion only)

You will first need to find a Legendary weapon with an attack of at least 4000 or 5000. Anything lower than 4000 Attack will make reaching 30,000 Attack very difficult. However, if by chance you happen to come across a Concentrated Mana Pearl which can increase a weapon’s attack power by over 307%+, and add a few catalysts that offer at least 2000 to 3000 Attack per upgrade, you can reach 30,000 Attack or more with little effort. Once you have a weapon over 30,000 Attack, this trophy will unlock.

The same applies to Ultimate Weapon!? , but requires 10,000 Attack on a single weapon at a given time.