Curse

Curse is a combat support spell which lowers an opponents defence by 5%.

Requirements
A Staff may be used to substitute for the earth or water.
 * Level 19 Magic, or 16 with a Wizard's Mind Bomb
 * Body rune
 * 3 Earth runes
 * 2 Water runes

Failed cursing
Casting curses in full metal armour, against monsters that are plentiful, cannot reach you, and are not in excessive demand, is a way to level up at low cost, or no cost if you make all the runes, and does not raise combat level with extra hitpoints.

The usual method is to buy the body runes, make one of the other runes and use a staff for the third. While the spell uses fewer water runes, the altar is a longer walk than the earth altar.

Popular targets are: There are a few other places where you can find useful targets that may be trapped, or low levels that can be cursed a couple of times and then killed.
 * Ducks at Lumbridge
 * Scorpions at the Al-Kharid mine, from the rim
 * Port Sarim jail inmates