Black Rose Wars Duel Lex- how to play

About Black Rose Wars: Duel – Lex, from BoardGameGeek:

In a Templar stronghold, hidden in the Germanic moors, lies the power of the Black Rose. Its catacombs house the mortal remains of the powerful and feared Ulrich, yet he is now no longer dormant. Many have tried to seize the secrets of his power, but so far, all have failed. Now it is the turn of Bartholomäus, who aspires to become Master of Lex, a new school devoted to the occult, born in the heart of the Black Forest and spreading rapidly throughout the Holy Roman Empire. Duel - Lex will take you into a magical world of forbidden spells and deadly evocations, where every ten years, different mages compete to decide who will be the next Grand Magister. Duel - Lex introduces a new way to play fast and exciting two-player mage fights! Two mages clash in the cramped underground rooms of a Templar stronghold, choosing and planning spells and actions from a common deck and managing their own evocations and resources. Duel - Lex can also be used to expand Black Rose Wars and Black Rose Wars: Rebirth! -description from the publisher