Dark Crisis (DCR) it revolves around Fiend-Type monsters and contains two new types of Monster Cards; "Guardians" and "Archfiends". Guardians require a specific Equip Spell Card face-up in order to summon them. Archfiends require Life Points to use, but they have powerful effects. Highly sought-after cards include "Reflect Bounder," "D.D. Warrior Lady" and "Butterfly Dagger - Elma.