The Objective;
Kill a certain number of MVPS per Difficulty Setting (Normal, Nightmare, Hell) to spawn Antonio in the middle of the map, then kill Antonio.
The Reward; Each CHARACTER can gain a DAILY bonus of massive exp and massive hundreds of coins. About 12m exp on Hell difficulty, then the exp and coin is lower but never zero.
The Content;
MVP spawn at the edges of the map but in semi-random positions so sometimes they can spawn together, or even at the starting area, but are generally in a set location, and only consist of Garm and Stormy Knights. Every Myst Case is free to kill for Costume Boxes/Gift Boxes/Candy/Coins but Angry Myst Cases are dangerous and hostile, but still killable. They all have like 999 HIT so cannot be dodged.
Walkthrough;
The easiest current strat is to divide the party into 2 roles
Anyone capable of killing and doing decent damage like a Wizard with JT/Meteor and Snipers, ranged attackers specifically, can also aid with luring but after a couple MVPs are lured they can hang out at the center and just focus on killing what the kiters bring.
The Kiters are going to spread out and find the mvps, then lure them to the center, positioning them to the edge of the center square, at the lower ledge area, then teleporting away. The MVPs will get stuck there, and allow the ranged attackers on the second floor to kill them overtime easily (and quickly if enough damage).
The easiest way to kite is to stay at the edge of their attack zone, any class can kite using this method, as you can aggro the MVP but stay outside the range of casting spells or attacks. Garm is the easiest and slowest, but Stormy has a bafflingly long range crit 1-frame attack. Fast moving classes have an advantage like monk Snap and Knights, and Stalkers can be completely invisible to Myst Cases while luring MVPS.
When the MPV count goes down to zero, a single player should position themselves in the center. Antonio spawns at the dead center and then aggros this player, they kite Antonio towards the bonfires to increase Antonio's weakness. Usually a Steel Body Champ or a Snap Champ or a Knight can lure easily, and do so around the outside of the center square area in a circle, then positioning Antonio just like all other MVPs. The rest of the party can just stay in the center in one of the little staircase areas to avoid aggroing Antonio.
Each Bonfire will Increase the damage Antonio takes from all sources by a % for each difficulty (Nightmare only requires 2 bonfires to reach 100%).
Kill.
Note: Garm takes more damage from Wind, and Stormy takes highest damage from Earth or Fire/Meteor.