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Released 24 May 2001 (Update)
Members No
Level Magic 11
Spellbook Standard
Type Combat
Experience 21
Runes 2Earth 3Water 1Body
Casting speed 5 ticks
Description Reduces your opponent's strength by 5%
Sound Effect
Weaken icon (mobile).png

Weaken is a level 11 Magic spell. When cast on an opponent, their strength is reduced by 5%. The spell gives experience whether it hits or misses, making it a popular way to gain experience cheaply. The spell can only be cast if the targets stats haven't already been lowered, meaning you can not stack stat reduction with multiple spells in a row.

The spell grants 21 Magic experience and requires three water, two earth, and one body runes to be cast.

Cost[edit | edit source]

Spell cost
3Water rune.png2Earth rune.png1Body rune.png30
Combo runes
3Water rune.png1Body rune.png2Dust rune.png32
1Body rune.png3Mud rune.png242
3Water rune.png1Body rune.png2Lava rune.png34
2Earth rune.png1Body rune.png3Steam rune.png258
2Earth rune.png1Body rune.png3Mist rune.png285
2Earth rune.png1Body rune.pngStaff of water.pngAlt15
3Water rune.png1Body rune.pngStaff of earth.pngAlt20
1Body rune.pngMud battlestaff.png5
Main and off-hands
2Earth rune.png1Body rune.png0.05Soaked page.pngTome of water.png50
1Body rune.png0.05Soaked page.pngStaff of earth.pngAltTome of water.png40

Failed Cursing[edit | edit source]

Casting Weaken while wearing full metal armour (including an elemental staff with no more than +10 magic points) can give a magic attack as low as -65, which guarantees a "splash," or a missed hit. This provides very cheap Magic experience, as players can instantly recast the spell on the same target. Additionally, casting Weaken grants players no experience in the Hitpoints skill and, thus, is useful to pures.

The usual method is to buy the Body runes needed for the cast, as well as an appropriate amount of one of the other two runes, and using the respective staff of the third rune. An expensive alternative is to buy a Mud battlestaff, which provides an unlimited supply of both Water and Earth runes.

When doing this method, it is helpful to position a monster so that it is just on the edge of your screen, so that there is minimal distance between it and your spellbook.