Humidify

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This article has a money making guide here: Humidifying clay.
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The humidify spell will fill all empty water-carrying vessels in a player's inventory with a single cast including: buckets, fishbowls, jugs, vials, watering cans, unwatered saplings, waterskins, bowls, and clay. Somewhat surprisingly, it does not work on Empty cups. It yields 65 experience per cast regardless of the number of vessels filled. It can also be used to extinguish the wall of flames in the Chambers of Xeric when fighting Great Olm or to refill waterskins in the Kharidian Desert instead of needing to cut cacti.

A steam battlestaff, or staff of water and tome of fire or vice versa can be used for maximum efficiency. It can be used to train Magic while making profit from some of the items above:

Input Output Profit
Bowl.png Bowl Bowl of water.png Bowl of water 27
Bucket.png Bucket Bucket of water.png Bucket of water 34
Clay.png Clay Soft clay.png Soft clay 21
Jug.png Jug Jug of water.png Jug of water 22
Vial.png Vial Vial of water.png Vial of water 0
Waterskin(0).png Waterskin(0) Waterskin(4).png Waterskin(4) 26

To maximise experience per hour with this spell, put a fishbowl underneath the spell (similar to High Level Alchemy) and to the "F1" and "F6" keys (or custom F-keys) to switch between spellbook and inventory. Left-click empties the fishbowl. Casting High Level Alchemy is always cheaper when alchemising profitable items while this method always results in loss. Upon hearing the sound effect, all vessels have been filled.

Cost[edit | edit source]

Spell cost
InputCost
1Astral rune.png1Fire rune.png3Water rune.png166
Combo runes
1Astral rune.png1Fire rune.png3Mud rune.png625
1Astral rune.png3Water rune.png1Lava rune.png165
1Astral rune.png3Water rune.png1Smoke rune.png225
1Astral rune.png3Steam rune.png359
1Astral rune.png1Fire rune.png3Mist rune.png589
Main-hands
1Astral rune.png1Fire rune.pngStaff of water.pngAlt151
1Astral rune.png3Water rune.pngStaff of fire.pngAlt161
1Astral rune.pngSteam battlestaff.png146
Main and off-hands
1Astral rune.png3Water rune.pngTome of fire.png161
1Astral rune.png1Fire rune.pngTome of water.png151
1Astral rune.pngStaff of water.pngAltTome of fire.png146
1Astral rune.pngStaff of fire.pngAltTome of water.png146

Update history[edit | edit source]

Date Changes
30 October 2014
(update | poll)

The Lunar spell Humidify will now work on saplings held in your inventory.

15 August 2013
(update | poll)

The 'Humidify' spell can now be used to soften clay.

22 February 2013
(update)

This content was included when the Old School RuneScape servers officially launched.