The Alluvion is a craftable post-Moon Lord bow and a direct upgrade of the Monsoon. It rapidly auto-fires double volleys of 6 arrows. While equipped with Wooden Arrows, the top and bottom arrows are converted into into Typhoon Arrows, which erupt into swirling typhoons on contact with enemies or tiles; the middle two arrows are converted into Torrential Arrows, which are high-velocity lasers that ignore NPC immunity frames; and the other two arrows are converted into sharks.
Its best modifier is Unreal.
- For a full crafting tree, see here.
- This weapon is a good way to farm The Devourer of Gods, as its piercing Torrential Arrows and area of effect Typhoon Arrows can cause significant damage to the Devourer's many segments. If used correctly when paired with Bloodfire Arrows, it is possible to quickly recover damage dealt by the Devourer thanks to the Bloodfire Arrows' healing effect.
- The word "alluvion" can refer to either a flood or the flow of water against a shore.
- The Alluvion and the Monsoon both share the color scheme of the Tempest Staff.