RuneScape 3 icon
Old School RuneScape icon
Greater Demon

Released 27 February 2002 (Update)
Combat level 90
Hitpoints 90
Stats (?) 90/90/90
Hits XP (?) 50
Experience (?) 150
Fatigue (?) 2%
Hostility Other (?)
Pay-to-play Yes
Poisonous No
Max hit 10
Weakness Silverlight
Examine A freshly summoned demon
Thrantax is a demon encountered during the Merlin's Crystal quest. If the player uses the wrong magic incantation while summoning him, you will have to defeat Thrantax and try again. If the correct magic incantation is recited, "Snarthon Candtrick Termanto.", the demon will free Merlin without a fight.

The demon is weak to Silverlight. Thrantax has the same appearance as a Greater Demon. He is one of eight "unique" demons encountered in the game, most which are encountered through quests.


This article on a monster has an associated dialogue page.


Duplication glitch

See also: List of Glitches in RuneScape Classic
Thrantax glitch

Several players stand by as Thrantax is cloned 64 times.

The NPC duplication glitch is simple to recreate unintentionally in the case of Thrantax - a demon summoned during the course of the Merlin's Crystal quest. After summoning the demon and spawning an NPC, the player is given dialogue choices. However if they click out of the dialogue, the demon will remain but will not be able to be attacked. This allows for the player to repeatedly drop bat bones, creating a teleport animation and new NPC to appear each time the bones are dropped. This does not consume the bat bones. In testing, up to 64 demons were able to be spawned before new NPC's ceased to be created.

Later versions of RuneScape

In later versions of RuneScape it is also possible to continue summoning Thrantax, although he appears as a ghost in both Old School RuneScape and RuneScape 3, and he is not duplicated in the process of dropping bat bones repeatedly.

Treestump This article is a stub.
You can help by expanding it.

Community content is available under CC-BY-SA unless otherwise noted.