Blind Descent Arrows and Acidic Arrow Payload Recipe

The quick answer

Pick up a Reed to use as a basic arrow. The Acidic Arrow Payload recipe lists one Acid Sac and eight Milkpod Pearls for eight payloads.

October Steam co-op playtest

Use a Reed as an arrow

Pick up a Reed from the ground. The inventory lists it as Ammo, and you can fire it directly with a bow.

The refining screen lists these ingredients for 8 Acidic Arrow Payloads.

Ingredient	Quantity
Acid Sac	1
Milkpod Pearl	8

The Security objective Attach a material to an arrow shows the R prompt in the October playtest.