(Clear the game w/o continuing and with 30+ Mana Items.)
This trophy can be kinda difficult, but nothing severe due to the fact that you can change the difficulty to VERY EASY. Try to win as many matches without losing any rounds or players. Use your Mana Attack very wisely & block when necessary. When you have exceeded 24 Mana items, you will be able to fight the True Boss, The King that has No Name.
The Boss can be tricky at times to attack, due to the areas that you are limited to attack upon and not to mention that he can deal a great amount of damage too. I would not recommend Air attacks on TKHNN, as it's a good counter for him to hit you.
At the same time you will also unlock Dragon Slayer & any 1 of the 7 trophies. I got these trophies on my 1st try and I was using the 3 Humans with the Blue War Hammer item. Maybe I was lucky on some attacks or matches, though.
Trophy will unlock after entering in your initials!