Yaroslav II of Vladimir’s Helmet

Origin
The unfortunate task of rebuilding the various proto-Russian cities after a sound 13th century beating from the Mongols fell upon Yaroslav II of Vladimir. His ascent from princehood saw conflicts with his brothers for different thrones and defeat at the hands of his father-in-law.

Novgorod finally tenured in his application for ruler and he stunted the growth of Estonia and Finland. When they refused to fight their neighbor Pskov, Yaroslav captured one of their vassal cities and cast them aside for Kiev, then Vladimir. Attempts to make peace with Batu Khan and stop Mongol pioneering went well. At least until the Great Khan mother Töregene poisoned him. Better luck next time.

Effects
Desire to vanquish foes through challenge or direct combat. Winner takes all situations and peace agree arguments after normally result. Causes extreme sickness whenever approached by one’s siblings.