The trident of the swamp (or uncharged toxic trident when uncharged) is a powered staff requiring 75 Magic to wield.
the trident possesses a passive effect in which successful hits with either the built in attack or a manually cast spellbook attack, have a 25% chance of inflicting venom on their opponent.
In order to use the trident's magic spell, it must be charged with various runes, holding up to 2,500 charges runes include 2500 chaos rune, 2500 death runes, 12500 fire runes and 2500 Zulrah Scales