Mortal Serpent

Rampage Skills:

Slot 1: Attack Boost IV
Attack +10

Slot 1: Poison Boost I
Poison buildup +3

Slot 1: Phial Switch Boost
Grants special effects to phials when executing morph attacks.

Rampage Skills (from Upgrade):

Slot 1: Affinity Boost I
Affinity +4%

Slot 1: Affinity Boost II
Affinity +6%

Slot 1: Attack Boost II
Attack +6

Slot 1: Attack Boost III
Attack +8

Slot 1: Defense Boost I
Defense Bonus +10

Slot 1: Dulling Strike
Has a chance to increase attack power when your sharpness gauge is green or lower.

Upgradeable to:

Mortal Serpent+ Crafted

Upgraded from / with:

Venom Hatchet II Crafted

Remobra Hide+ x4 Carbalite Ore x4 Toxin Sac x3

Remaining crafting materials:

Craft from scratch:

Remobra Hide+ x4 Carbalite Ore x4 Toxin Sac x3 Rathalos Webbing x2 Striped Hide x3 Dragonite Ore x3 Remobra Hide x2 Remobra Head x1 Poison Sac x1 Eroded Skeleton x3 Monster Bone M x2 Machalite Ore x2 Dragonhusk Shard x2 Jumbo Bone x1 Sharp Claw x2 Monster Bone S x3 Bone Scrap x2