Nemesis Diagram:

At the start of a war session the wielder of the Nemesis Diagram may designate three units, which must include the ruler unit, to gain the magical special trait. If one of the designated units attack another unit that has an armor value of 0, it gains an attack and an additional damage. Additionally, all progress quest to create a new unit gain +1 progress. The Nemesis Diagram has a Character Magic upkeep of 1.