Heavy Bowgun Gravios Tree

Gravios Howl I

Rarity 6

A massive Gravios bowgun that shakes environs with each potent blast from its gigantic muzzle.

How to get it

Step 2 of 2

Upgrade from Queen's Longfire I at the Smithy.

Step 1 · Forge Rarity 5
Queen's Longfire I
Rathian Scale+ ×5, Rathian Webbing ×3, Rathian Spike+ ×2, Rathian Certificate S ×1

Also branches to Queen's Longfire II
Step 2 · Upgrade Rarity 6
Gravios Howl I
Gravios Skull ×3, Gravios Pleura+ ×4, Gravios Wing ×5, Gravios Certificate S ×2

Also branches to Gravios Gigahowl, Tödlicher Abzug I
This weapon

Queen's Longfire I → Gravios Howl I

Material	Qty	Comes from	Highest listed chance
Gravios Skull	×3	Gravios	100% broken part · gravios
Gravios Pleura+	×4	Gravios	100% broken part · gravios
Gravios Wing	×5	Gravios	100% broken part · gravios
Gravios Certificate S	×2	Gravios	8% target reward · gravios

Queen's Longfire I → Gravios Howl I

Material	Qty	Comes from	Highest listed chance
Rathian Scale+	×5	Rathian	60% carve · severed, rotten · rathian
Rathian Webbing	×3	Rathian	100% broken part · rathian
Rathian Spike+	×2	Rathian	80% carve · severed part · rathian
Rathian Certificate S	×1	Rathian	8% target reward · rathian
Gravios Skull	×3	Gravios	100% broken part · gravios
Gravios Pleura+	×4	Gravios	100% broken part · gravios
Gravios Wing	×5	Gravios	100% broken part · gravios
Gravios Certificate S	×2	Gravios	8% target reward · gravios

2 monsters

Gravios Flying Wyvern

Provides Gravios Skull, Gravios Pleura+, Gravios Wing, Gravios Certificate S

Seen in Oilwell Basin, Ruins of Wyveria

Rathian Flying Wyvern

Provides Rathian Scale+, Rathian Webbing, Rathian Spike+, Rathian Certificate S

Seen in Oilwell Basin, Scarlet Forest, Windward Plains