MVPhttps://irowiki.org/wiki/MVP

MVP stands for Most Valuable Player, a definition not exclusive to Ragnarok Online. This is a monster with Boss Protocol and MVP Protocol. MVPs are much stronger than other normal monsters and appear on an array of maps throughout the game. MVPs only spawn at certain times, anywhere from once per hour to once every 24 hours since the last MVP of that kind was killed. While MVPs can be defeated by a single person (depending on the class of the player), they are most often taken down by a party of two or more players. Because of the difficulty of defeating an MVP, they give a high amount of experience and MVP rewards given directly to the player's inventory to the player who tank and deals the most damage to it. If the player get killed as the MVP dies, and there's no one else eligible for the reward on the map, someone is randomly selected on the map and receives it. They are also free-for-all, meaning that anyone can attack them, disregarding who found it first or summoned it. First hit on the MVP is only important for loot priority, not the MVP reward.

MVPs will also summon slaves or mobs to make defeating the MVP more difficult. The mob will often times consist of three to nine monsters, sometimes all of them the same, sometimes different, depending on the MVP. Unlike normal monster, MVP doesn't show health bar. To check its remaining HP, the player can use Sense.

When killed, MVPs not spawned by a player (e.g. Ktullanux, see Special Spawn section) will leave behind a Tomb at the spot in which they were killed. Speaking to the Tomb yields the MVP's time of death, along with the name of the player who received the MVP award for killing it. The Tomb does not give information as to the time or location the MVP will spawn next time. The time given is in PST. The Tomb will disappear 5 seconds after the MVP have respawned.

Normal MVPs spawn on a set amount of time with a variance of 10 minutes after the previous one was defeated. For example, if Amon Ra is defeated at 11:00, it would spawn again between 12:00-12:10. If an MVP spawns in multiple places, the two times are independent of one another and the respawn period may be different. Below is a list of all normal MVPs, where they are located, and the time that needs to elapse before it will respawn.

• Eddga is located on Payon Field 10 (2 hours) and Balder Guild Dungeon (8 hours)
• Tao Gunka is located on Beach Dungeon, West Cave (5 hours)
• Amon Ra is located on Morroc Pyramid B2F (1 hour)
• Dracula is located on Geffen Dungeon 2 (1 hour)
• Golden Thief Bug is located on Prontera Culvert 4 (1 hour)
• Phreeoni is located on Morroc Field 15 (2 hours) (Morroc Field 17 in Renewal)

• Atroce is located on Rachel Field 02 (4 hours), Rachel Field 03 (3 hours), Rachel Field 04 (5 hours), Veins Field 01 (5 hours), Veins Field 02 (6 hours)
• Lady Tanee is located on Ayothaya Dungeon 2 (7 hours)
• Mistress is located on Mt. Mjolnir 4 (2 hours)
• Moonlight Flower is located on Payon Cave 5 (1 hour)
• Osiris is located on Pyramid 4F (1 hour)
• Drake is located on Sunken Ship 2 (2 hours)
• Pharaoh is located on Sphinx 5 (1 hour)
• Hatii is located on Lutie Field (2 hours)
• Turtle General is located on Turtle Island 4 (1 hour)
• Maya is located on Ant Hell 2 (2 hours) and Valkyrie Realms Guild Dungeon (8 hours)
• Gopinch is located on Dremuchi Forest (2 hours)

• Doppelganger is located on Geffen Dungeon 3 (2 hours) and Luina Guild Dungeon (8 hours)
• Egnigem Cenia is located on Somatology Laboratory 2 (2 hours)
• Kiel-D-01 is located on Kiel Dungeon 2 (2 hours)
• Orc Hero is located on Geffen Field 12 (1 hour) and Geffen Field 2 (24 hours)
• Evil Snake Lord is located on Kunlun Dungeon 3 (94 minutes)
• Samurai Specter is located on Amatsu Dungeon 3 (91 minutes)
• Vesper is located on Juperos Core (2 hours)
• Gloom Under Night is located on Rachel Sanctuary 5 (5 hours)
• White Lady is located on Louyang Dungeon 3 (117 Minutes)
• Fallen Bishop is located on Cursed Monastery 2 (2 hours)

• Baphomet is located on Labyrinth Forest 3 (2 hours)
• Dark Lord is located on Glast Heim Chuchyard (1 hour) and Britoniah Guild Dungeon (8 hours)
• Detardeurus is located on Abyss Lake 3 (3 hours)
• Ifrit is located on Thor's Volcano 3 (11 hours)
• Lord of the Dead is located on Niflheim (133 minutes)
• Orc Lord is located on Geffen Field 10 (2 hours)
• RSX 0806 is located on Mine Dungeon 2 (125 minutes)
• Stormy Knight is located on Toy Factory 2 (1 hour)
• Valkyrie Randgris is located on Odin Shrine 3 (8 hours)
• Wounded Morocc is located on Dimensional Gorge (12 hours)
• Beelzebub is located on Cursed Monastery 3 (12 hours)

One of the following MVPs (chosen randomly) will spawn between 95 to 150 minutes after the previous MVP is defeated on Somatology Laboratory 3. These are all classified to be of High Difficulty.

• Assassin Cross Eremes
• High Priest Margaretha
• High Wizard Kathryne
• Lord Knight Seyren
• Master Smith Howard
• Sniper Cecil

Whenever enough monsters are killed on the map to summon the MVP the server does the following.

1. Is the MVP summoner active?
if = True Do, nothing
if = False, Summon MVP

After an MVP is killed a timer starts where 4 hours later the MVP summoner npc disables itself and the summons can happen again.

From what I read from the script you will be able to summon an MVP immediately after maintenance. As the summoning npc starts off disabled.

The following MVPs have special spawn conditions that do not follow either the timed spawn model.

• Baphomet (Event) is an event boss and only spawns when GMs decide to spawn it.
• Poring the Conqueror (aka Bring It On) is an event boss and only spawns when GMs decide to spawn it. This MVP is classified as Very High difficulty.
• Ktullanux is spawned by using 4 Freezing Snow Powder (obtained via the Ice Necklace Quest) or 4 Ice Scale (obtained by defeating Ktullanux previously) to put out the four sacred fires on Ice Dungeon 3. Once defeated, Ktullanux cannot be resummoned for another 2 hours. This MVP is classified as Mid-High difficulty.
• Memory of Thanatos is spawned by the completion of the Thanatos Tower Quest. This MVP is classified as Medium difficulty.
• Naght Sieger (Floor 101) and Entweihen Crothen (Floor 100) spawn in the Endless Tower instance.
• Nidhoggur's Shadow spawns in the Nidhoggur's Nest instance.
• Bijou spawns in the Room of Consciousness instance.
• Corruption Root and Amdarais spawns in the Old Glast Heim instance.
• Faceworm Queen spawns in the Faceworm Nest instance.
• Stephen Jack Ernest Wolf spawns in the Sky Fortress instance.
• Buwaya spawns in the Buwaya's Cave instance.
• Bakonawa spawns in the Bakonawa Extermination instance.
• Bangugot spawns in the Bangungot's Instance instance.
• Pet Child spawns in the Werner Laboratory Central Room instance.
• Heart Hunter Ebel spawns in the Heart Hunter War Base 2 instance.
• Angry Moonlight Flower spawns when 999 Angry Nine Tails have been killed in the Illusion of Moonlight dungeon.
• Illusion Dracula spawns when 30 Unreliable Fake Blood daily quest have been completed in the Illusion of Vampire dungeon.
• Awaken Ktullanux spawns when ??? in the Illusion of Frozen dungeon.
• Ominous Turtle General spawns when

Random Boss Spawn
Angeling	Deviling	Arc Angeling	Ghostring	Orc Hero	Orc Lord	Maya	Eddga	Tao Gunka
Golden Thief Bug	Osiris	Phreeoni	Dracula	Doppelganger	Mistress	Moonlight Flower	Lady Tanee
Baphomet	Pharaoh	Drake	Stormy Knight	Boitata	Lord of the Dead	Dark Lord	Hatii
White Lady	Ktullanux	Memory of Thanatos	RSX 0806	Evil Snake Lord	Turtle General	Atroce	Kiel-D-01
Detardeurus	Gloom Under Night	Queen Scaraba	Valkyrie Randgris	Gopinich	Vesper	Ifrit	Beelzebub

• Abysmal Knight Helm - Reduces damage taken from Demi-Human and Boss monsters by 10%.
• Anubis Helm:
  • Reduces damage taken from Boss monsters by 2%.
  • If upgrade level is +5, reduces damage taken from Boss monsters by an additional 1%.
  • If upgrade level is +6, reduces damage taken from Boss monsters by an additional 1%.
  • If upgrade level is +7, reduces damage taken from Boss monsters by an additional 1%.
  • If upgrade level is +8, reduces damage taken from Boss monsters by an additional 2%.
  • If upgrade level is +9 or higher, reduces damage taken from Boss monsters by an additional 3%.
• Black Feather - If Invisibility is level 5, increases physical damage on boss monsters by 50%.
• Devil's Hand - If upgrade level is +10 or higher, increases physical damage on Boss monsters by 50%, if Rampage Blast is at maximum level.
• King of Spirit Circlet - If Elemental Shield is level 5, increases magical damage on boss monsters by 25%.
• Lord of the Dead Helm - Increases physical damage on Boss monsters by 10%.
• Ring of Jupiter [1] - When equipped to Right Accessory (1), if the user's base Luk is 125 or higher, increases Physical and Magical damage on boss monsters by 15%.
• Sacred Crown - If Clearance is level 5, increases magical damage on boss monsters by 25%.
• Siegfried's Helmet:
  • Reduces damage taken from Boss monsters by 5%.
  • If upgrade level is +6 or higher, reduces damage taken from Boss monsters by an additional 5%.
  • If upgrade level is +8 or higher, reduces damage taken from Boss monsters by an additional 10%.
• Splash Cat Hat:
  • If upgrade level is +7 or higher, reduces damage taken from Boss monsters by 10%.
  • If upgrade level is +9 or higher, reduces damage taken from Boss monsters by an additional 10%.
• Work Cap - Increases physical damage on Boss monsters by 50%, if FAW Magic Decoy is at maximum level.
• Zealotus Doll [1] - Reduces damage taken from Boss monsters by 5%.

• Gae Bolg - Increases physical damage on boss monsters by 10%.

• Blacksmith's Gloves [1] - Increases physical damage on Boss monsters by 5%.

• Abysmal Knight (Weapon) +25% damage to Boss monsters (inc. MVPs)
• Alice (Shield) 40% less damage from Boss monsters, 40% more from others

• Gelerdria & Storm Stone Set:
  • If Gelerdria upgrade level is +7 or higher, increases physical damage on Boss monsters by 30%.
  • If Gelerdria upgrade level is +9 or higher, increases physical damage on Boss monsters by an additional 20%.
• Celine's Brooch & Celine's Ribbon Set:
  • Increases magical damage on Boss monster targets by 10%
  • If upgrade level is +7 or higher, increases magical damage on Boss monster targets by an additional 20%
  • If upgrade level is +9 or higher, increases magical damage on Boss monster targets by an additional 20%
• Celine's Brooch & Lush Rose Set: If upgrade level is +7 or higher, increases magical damage on boss monster targets by 20%.
• Celine's Brooch Type K & Celine's Ribbon Set: If upgrade level of Celine's Ribbon [1] is +11 or higher, increases magical damage on boss monster targets by 20%.
• Illusion War Axe & Illusion Military Boots Set:
  • Increases physical damage on Boss monsters by 70%.
  • Reduces damage taken from Boss monsters by 25%.
• Zealotus Doll & Zealotus Cute Pet Set:
  • Reduces damage taken from boss monsters by an additional 5%.
  • If pet is friendly or higher, reduces damage taken from boss monsters by an additional 5%.

• Safeguard Shadow Shield:
  • Reduces damage taken from Boss enemies by 1%.
  • If upgrade level is +7 or higher, reduces damage taken from Boss enemies by an additional 1%.
  • If upgrade level is +9 or higher, reduces damage taken from Boss enemies by an additional 1%.
• Liberation Shadow Shoes:
  • Increases physical damage on Boss targets by 2%.
  • If upgrade level is +7 or higher, increases physical damage on Boss targets by an additional 1%.
  • If upgrade level is +9 or higher, increases physical damage on Boss targets by an additional 2%.
• Liberation Set: Increases physical damage on Boss targets by 5%.

• Convex Mirror (iRO Valkyrie) Shows location (if out) and gives spawn time for an MVP when used on the map it spawns on

For more information on each of these monsters, visit:

irowiki DB - MVP list.

Monsters in Ragnarok Online
Race	Angel • Brute • Demi Human • Demon • Dragon • Fish • Formless • Insect • Plant • Undead • Human • Doram
Element	Holy • Shadow • Neutral • Water • Fire • Wind • Earth • Ghost • Poison • Undead
Misc.	Boss Protocol • MVP (Free for All) • Size • Kill Stealing • Monster Skills