Royal Monsters are the toughest fights in Monster Hunter Stories 3, and Royal Aenshin sits at the top of that list. They are gated behind almost everything else in the main story, and unlike most of the base game, they punish a careless loadout. You need to commit to a damage-first setup and lean on a small set of decorations to survive the scaling.
Quick answer: Run the Arkveld-style damage build for Royal Aenshin (Veldian Gladius, Veldian Sibilus, Veldian Hasta, Arkvulcan Armor) with Heroic Testament XL, Razewing Ratha Power, and Deadeye Ratha Power, and keep Ratha plus a Dragon/Fire Monstie spread on the team.
What Royal Monsters actually change
Royal Monsters are not new variants in the way Tempered or Arch-tempered monsters are. They are the same monsters you already know, with their HP and damage pushed up to Level 99. Their movesets and skills stay the same, so nothing about their patterns changes.
The closest comparison is fighting a Master Rank monster while wearing High Rank gear. The enemy hits harder and lives much longer, but it behaves like the version you fought earlier. That makes raw damage output the priority. Survivability takes a back seat because you cannot out-tank these stat blocks anyway.
Mandatory decorations for Royal fights
Three decorations carry most of the weight in these encounters. Slot them before anything else.
- Heroic Testament XL
- Razewing Ratha Power
- Deadeye Ratha Power
Decorations like Heroic Testament and Tenacity are very strong here, and so are the new Jewels added with the Side Story Rudy DLC. If you do not have Heroic Testament XL yet, Tenacity XL is the fallback. The Ratha Power decorations only pay off when you are actively hitting an elemental weakness, so they are best paired with a build that matches the monster’s element.
Best build for Royal Aenshin
Royal Aenshin responds best to the Arkveld build with a few changes. Aenshin is weak to Dragon and Fire, so the team is built around hitting those weaknesses hard while keeping Ratha on hand. Ratha stays essential because it is immune to Petrifaction, the status that stops stamina recovery and downs a character if it lands a second time.
| Slot | Gear and skills |
|---|---|
| Long Sword | Veldian Gladius (Rage Slash, Charge Tackle, Strong Charged Slash) |
| Hunting Horn | Veldian Sibilus (Defensive Ditty, Lyrical Legato, Kinship Chorale) |
| Gunlance | Veldian Hasta (Shelling, Charged Shelling, Hail Cutter) |
| Armor | Arkvulcan Armor (Razewing Ratha Power) |
The Monstie lineup spreads element coverage so you always have an answer to Aenshin’s shifting resistances:
| Monstie | Element role |
|---|---|
| Ratha | Petrifaction immunity, Fire/Dragon |
| Malzeno | Dragon/Fire |
| Arkveld | Dragon/Non-elemental |
| Thunderlord Zinogre | Thunder |
| Namielle | Water/Dragon |
| Velkhana | Frost/Dragon |
Set every Monstie in this build to use Environmental Skill activation rather than Bingo Bonuses. Bingo Bonuses are great earlier in the game, but Environmental Skills give a stronger payoff for endgame fights like this one.
General build for other Royal Monsters
For the wider pool of Royal Monsters, the Malzeno build is the strongest early option thanks to its elemental damage and Kinship synergy. Swap the decoration to Heroic Testament XL here, since the Ratha Power decorations do not deliver unless you are exploiting a specific elemental weakness.
| Slot | Gear and skills |
|---|---|
| Long Sword | Duke’s Sinclair (Sakura Spiritblade, Retaliation Stance) |
| Hunting Horn | Duke’s Grail (Lyrical Legato, Defensive Ditty) |
| Bow | Duke’s Bloodwings (Quick Shot, Poison Coating) |
| Armor | Malzeno Armor (Heroic Testament XL) |
The Monstie roster stays the same as the Royal Aenshin lineup: Ratha, Malzeno, Arkveld, Thunderlord Zinogre, Namielle, and Velkhana. That spread keeps you covered across Dragon, Fire, Thunder, Water, and Frost so you can swap to whichever element the monster fears most.
One requirement matters before you take these fights seriously. Push your armor and weapons up to the “+” tier with their additional upgrades. Those upgrades raise your base stats, which is what lets you take down the biggest threats like the Calamitous Elder Dragons and Invasive Species.
How to unlock Heroic Testament XL
Heroic Testament XL is the single most useful decoration for Royal Monster fights, so unlock it as soon as you can. You get it by clearing all four Calamitous Elder Dragon encounters without repelling them. Those encounters cover Namielle, Yama Tsukami, Velkhana, Ibushi, and Narwa.
Until then, Tenacity XL fills the same role well enough to keep these fights manageable. Once Heroic Testament XL is slotted, the Royal encounters become far more tolerable, and the damage-first builds above start doing what they were designed to do.
Treat these loadouts as a starting point rather than a fixed script. The core idea holds across every Royal fight: stack the right decorations, match the monster’s elemental weakness, keep Ratha for Petrifaction safety, and let damage carry the encounter while survivability stays secondary.
