Dota 2 Wiki

River Vial: Oil is an item purchasable at the Main Shop, under Attributes.

Available in the Base Shop
River Vial: Oil
River Vial Oil icon.png
Cost 0 Gold
Sell Value -
Stacks NO LIMIT / Inventory Slot
Stock 1 INIT / 1 MAX
15 minutes 900
Active Paint River
Charges 10 INIT
Bonus ?
Shareable No
Usage Alert ? No
River Vial: Oil (0)

Additional Information[]

  • Stacks with itself in the inventory, although the number of stacks is not indicated on the icon.
  • It alters the appearance of the river, and can only be purchased when the player has a River Vial: Oil (Tool) in their armory.


Paint River
Pour this serum into the river to make the water oily for 15 minutes. Using this item on the river will permanently consume one charge from your Armory supply upon expiration of the effect. Charges do not get consumed if the effect is replaced by a stronger vial before expiration. Vials can only be used if at least one charge remains in your Armory. Charges will only be used by successfully enchanting the river, and will not be consumed if the item is sold, dropped, or destroyed during a game. You can only cast a vial on the river if there's not a stronger vial already in effect.
Cast Range: 200
Duration: 900
Cooldown: 0


  • Can only target the water in the river.
  • Oil's strength is in the middle. It can be replaced by Electric, Potion and Blood, but not by Chrome, Dry and Slime.
  • The ingame item is immediately consumed upon use.
  • The Armory item loses 1 charge when the river effect lasted its full duration.