Explosive potion

Explosive potions are found on tables in the equipment room of the Saradominian and Zamorakian Castles in Castle Wars. They can also be found in the minigame Soul Wars. They can be used on barricades to instantly destroy them as well as the enemy catapult. It can also be used to clear or collapse the cave walls in the underground tunnel connecting the two castles. This is a useful strategy that many players employ, since dropping the rockslide on another player instantly kills them. These potions can't be taken outside of the Castle Wars area. If a player drops an explosive potion, it will cause 15 damage.

In Castle Wars it is recommended that the flag runner takes a few of these as it is common for the opposing team to barricade the flag room. When the flag runner gets the opposing teams flag, they are useful to halt pursuers temporarily by collapsing the rocks in the underground tunnels.