Teclis is Tyrion's twin brother, but two more different siblings would be hard to find. Teclis is frail and caustic - indeed, so feeble is he that his body can only be sustained by the consumption of magical potions. Yet no one, least of all Tyrion, sees Teclis as the weaker twin - his destiny merely lies along another path.
Teclis seeks to safeguard the whole world - thus will Teclis' legend endure long after heroes of the sword have been forgotten, for his actions shape not a battle, nor even a campaign, but the future of the world itself.