Equipping a fire tiara allows the opening of an extra inventory space that would normally be taken up by a talisman. Thus, instead of being able to only take 27 rune essence to the fire altar, the player may take 28 rune essence. The tiara provides no combat bonuses. While wearing a fire tiara, a player can left click on the fire altar to enter it.
The fire tiara can be used on the wicked hood, giving the hood two free teleports to the fire altar, and 100 free fire runes every day. This will consume the tiara.