This is a huge amount of damage , which can easily be game winning in the right situation
Dhampir Vampire Sheridan X DARK Rank 6 [ Zombie / XyzEffect ] ATK 2600 DEF 1000 2+ Level 6 monsters If you use a monster(s), with a Level, that is owned by your opponent for the Xyz Summon of this card, treat it as Level 6
Secret Rare (ScR) | Rainbow name foil
Since you do want to open with Polymerization or Dark Fusion, unlike Frightfur Fusion, because it facilitates the decks motion, I figured it would make sense to replace the 3rd Frightfur Fusion with the 2nd Dark Fusion, thus leaving me with the 2-2-2 line and maintaining the same semi-standard 6 fusion spell lineup
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Really, I have no good idea about how this fits into an itsu deck