Gravios Flying Wyvern
Provides Inferno Sac
Seen in Oilwell Basin, Ruins of Wyveria
How to tackle Gravios › Heavy Bowgun Yian Kut-Ku Tree
Yian Kut-Ku Cannon II
Rarity 7
A high-powered, high-caliber Yian Kut-Ku Heavy Bowgun. It makes liberal use of fire-resistant materials.
- Attack
- 210 RAW 315 displayed
- Decoration slots
- 23 Lv2 · Lv3
How to get it
Step 2 of 2Upgrade from Yian Kut-Ku Cannon I at the Smithy.
- Step 1 · Forge Rarity 5Yian Kut-Ku Cannon IKut-Ku Scale+ ×5, Kut-Ku Ear ×2, Kut-Ku Wing ×3, Yian Kut-Ku Certificate S ×1Also branches to Grounding Fulgur I
- Step 2 · Upgrade Rarity 7Yian Kut-Ku Cannon IINu Udra Certificate S ×2, Giant Beak ×4, Bird Wyvern Gem ×1, Inferno Sac ×4Also branches to Super Kut-Ku CannonThis weapon
Materials
Yian Kut-Ku Cannon I → Yian Kut-Ku Cannon II
| Material | Qty | Comes from | Highest listed chance |
|---|---|---|---|
 Nu Udra Certificate S | ×2 | Nu Udra | 8% target reward · nu udra |
 Giant Beak | ×4 | Yian Kut-Ku | 21% target reward · yian kut-ku |
 Bird Wyvern Gem | ×1 | Gypceros, Yian Kut-Ku | 100% target reward · gypceros |
 Inferno Sac | ×4 | Rathian, Rathalos, Guardian Rathalos, Gravios, Yian Kut-Ku | 30% carve · rotten · rathian |
Yian Kut-Ku Cannon I → Yian Kut-Ku Cannon II
| Material | Qty | Comes from | Highest listed chance |
|---|---|---|---|
 Kut-Ku Scale+ | ×5 | Yian Kut-Ku | 50% wound destroyed · yian kut-ku |
 Kut-Ku Ear | ×2 | Yian Kut-Ku | 100% broken part · yian kut-ku |
 Kut-Ku Wing | ×3 | Yian Kut-Ku | 33% target reward · yian kut-ku |
 Yian Kut-Ku Certificate S | ×1 | Yian Kut-Ku | 8% target reward · yian kut-ku |
| Nu Udra Certificate S | ×2 | Nu Udra | 8% target reward · nu udra |
| Giant Beak | ×4 | Yian Kut-Ku | 21% target reward · yian kut-ku |
| Bird Wyvern Gem | ×1 | Gypceros, Yian Kut-Ku | 100% target reward · gypceros |
| Inferno Sac | ×4 | Rathian, Rathalos, Guardian Rathalos, Gravios, Yian Kut-Ku | 30% carve · rotten · rathian |
Sources
7 monsters 
Guardian Rathalos Construct
Provides Inferno Sac
Seen in Ruins of Wyveria
How to tackle Guardian Rathalos › 
Gypceros Bird Wyvern
Provides Bird Wyvern Gem
Seen in Iceshard Cliffs, Oilwell Basin, Ruins of Wyveria, Windward Plains
How to tackle Gypceros › 
Nu Udra Cephalopod
Provides Nu Udra Certificate S
Seen in Oilwell Basin
How to tackle Nu Udra › 
Rathalos Flying Wyvern
Provides Inferno Sac
Seen in Oilwell Basin, Ruins of Wyveria, Scarlet Forest
How to tackle Rathalos › 
Rathian Flying Wyvern
Provides Inferno Sac
Seen in Oilwell Basin, Scarlet Forest, Windward Plains
How to tackle Rathian › 
Yian Kut-Ku Bird Wyvern
Provides Kut-Ku Scale+, Kut-Ku Ear, Kut-Ku Wing, Yian Kut-Ku Certificate S, Giant Beak, Bird Wyvern Gem, Inferno Sac
Seen in Iceshard Cliffs, Scarlet Forest
How to tackle Yian Kut-Ku › Related
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Yian Kut-Ku Cannon I