Dark Cavalry [DUPO-EN002] Ultra Rare Machine when a Spell/Trap Card

when a Spell/Trap Card

New cards for the "Rikka" and "Adamancipator" themes from Secret Slayers

by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")

Rise of the Duelist - Booster Box

Dark Cavalry [DUPO-EN002] Ultra Rare Machine when a Spell/Trap CardSet: Duel Power Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 2300 "Dark Magician" + 1 Warrior monster Gains 100 ATK for each Spell Trap on the field and in the GYs. If this card attacks a Defense Position monster, inflict piercing battle damage. When a card or effect is activated that targets a card on the field (Quick Effect): You can discard 1 card; negate the activation, and if you do, destroy it.