Water Arrows
From The DarkMod Wiki
Water arrows can be used to put out open flames like torches, fires and even candles. For best results, aim slightly higher than the flame you wish to extinguish.
- Tip: Candles can be picked up and pinched by pressing the Use key (Default: ENTER), thus you can save the water arrow for torches or lights in hard to reach areas.
Water arrows can also wash away blood and extend the reach of moss, by shooting an arrow into the blood/moss. They can also stimulate extra growth in a vine created by a vine arrow.
When you use a Holy Water inventory object, your water arrows become capable of damaging undead for a limited amount of time.
Note that the AI is able to relight fires, torches and candles, so use your water arrows wisely.