Dark Heart/Shadowsoul

Dark Heart is an archetype created by user Scorn9 and premiered in the booster pack Resurrected Prominence. The deck is based around Fusion summoning high ATK monsters with extremely powerful effects using "Dark Heart" monsters and, usually, the Opponent's Monsters. The "Dark Heart" Monsters' effects activate when used as fusion material, and the Shadowsoul Fusion Monsters, which require "Dark Heart" as fusion material, have effects that activate when monsters of certain attributes are used as the other fusion material monsters. Currently, there are only four "Dark Heart" Monsters and 2 "Shadowsoul" Monsters, but more are expected within Scorn9's next booster pack.

Playing Style
For "Dark Heart" and "Shadowsoul" decks, fusion summoning is the name of the game. That means heavy use of "Polymerization" and "Fusion Gate", but for the most part, just "Super Polymerization" and the generic "Dark Heart" spells and traps. The "Dark Heart" effects work much like the Monarchs: where "Mobius, the Frost Monarch" destroys 2 Spell/Trap upon being tribute summoned, "Dark Heart Vasi" destroys 3 Spell/Trap when used in a Fusion Summon with a WATER monster as another Fusion Material.

The main weakness found in "Dark Heart" decks is their reliance on fusion summoning and lack of consistent searching after "Sangan" and "Mystic Tomato". Another issue is that every "Dark Heart" monster is of a different type, making "Rivalry of Warlords" an exceedingly dangerous card.

Dark Heart Monsters

 * Dark Heart Ilman
 * Dark Heart Maa
 * Dark Heart Palo
 * Dark Heart Vasi

Shadowsoul Fusion Monsters

 * Shadowsoul Hydra
 * Shadowsoul Chimera

Spells

 * Chaos Polymer
 * Shadowsoul Polymerization

Traps

 * Shadow Overlap